373 lines
29 KiB
Plaintext
373 lines
29 KiB
Plaintext
#
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# wait_event_names.txt
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# PostgreSQL wait events
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#
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# Copyright (c) 2023, PostgreSQL Global Development Group
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#
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# This list serves as the basis for generating source and documentation files
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# related to wait events.
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#
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# The files generated from this one are:
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#
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# src/backend/utils/activity/wait_event_types.h
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# typedef enum definitions for wait events.
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#
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# src/backend/utils/activity/pgstat_wait_event.c
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# C functions to get the wait event name based on the enum.
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#
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# src/backend/utils/activity/wait_event_types.sgml
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# SGML tables of wait events for inclusion in the documentation.
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#
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# This file defines one wait event per line, with the following
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# tab-separated fields:
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#
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# "C symbol in enums" "format in the system views" "description in the docs"
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#
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# When adding a new wait event, make sure it is placed in the appropriate
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# ClassName section.
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#
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# WaitEventLWLock and WaitEventLock have their own C code for their wait event
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# enums and function names. Hence, for these, only the SGML documentation is
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# generated.
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#
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# This file is fed to src/backend/utils/activity/generate-wait_event_types.pl.
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#
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#
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# Wait Events - Activity
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#
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# Use this category when a process is waiting because it has no work to do,
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# unless the "Client" or "Timeout" category describes the situation better.
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# Typically, this should only be used for background processes.
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#
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Section: ClassName - WaitEventActivity
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WAIT_EVENT_ARCHIVER_MAIN ArchiverMain "Waiting in main loop of archiver process."
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WAIT_EVENT_AUTOVACUUM_MAIN AutoVacuumMain "Waiting in main loop of autovacuum launcher process."
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WAIT_EVENT_BGWRITER_HIBERNATE BgWriterHibernate "Waiting in background writer process, hibernating."
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WAIT_EVENT_BGWRITER_MAIN BgWriterMain "Waiting in main loop of background writer process."
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WAIT_EVENT_CHECKPOINTER_MAIN CheckpointerMain "Waiting in main loop of checkpointer process."
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WAIT_EVENT_LOGICAL_APPLY_MAIN LogicalApplyMain "Waiting in main loop of logical replication apply process."
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WAIT_EVENT_LOGICAL_LAUNCHER_MAIN LogicalLauncherMain "Waiting in main loop of logical replication launcher process."
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WAIT_EVENT_LOGICAL_PARALLEL_APPLY_MAIN LogicalParallelApplyMain "Waiting in main loop of logical replication parallel apply process."
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WAIT_EVENT_RECOVERY_WAL_STREAM RecoveryWalStream "Waiting in main loop of startup process for WAL to arrive, during streaming recovery."
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WAIT_EVENT_SYSLOGGER_MAIN SysLoggerMain "Waiting in main loop of syslogger process."
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WAIT_EVENT_WAL_RECEIVER_MAIN WalReceiverMain "Waiting in main loop of WAL receiver process."
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WAIT_EVENT_WAL_SENDER_MAIN WalSenderMain "Waiting in main loop of WAL sender process."
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WAIT_EVENT_WAL_WRITER_MAIN WalWriterMain "Waiting in main loop of WAL writer process."
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#
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# Wait Events - Client
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#
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# Use this category when a process is waiting to send data to or receive data
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# from the frontend process to which it is connected. This is never used for
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# a background process, which has no client connection.
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#
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Section: ClassName - WaitEventClient
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WAIT_EVENT_CLIENT_READ ClientRead "Waiting to read data from the client."
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WAIT_EVENT_CLIENT_WRITE ClientWrite "Waiting to write data to the client."
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WAIT_EVENT_GSS_OPEN_SERVER GSSOpenServer "Waiting to read data from the client while establishing a GSSAPI session."
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WAIT_EVENT_LIBPQWALRECEIVER_CONNECT LibPQWalReceiverConnect "Waiting in WAL receiver to establish connection to remote server."
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WAIT_EVENT_LIBPQWALRECEIVER_RECEIVE LibPQWalReceiverReceive "Waiting in WAL receiver to receive data from remote server."
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WAIT_EVENT_SSL_OPEN_SERVER SSLOpenServer "Waiting for SSL while attempting connection."
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WAIT_EVENT_WAL_SENDER_WAIT_WAL WalSenderWaitForWAL "Waiting for WAL to be flushed in WAL sender process."
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WAIT_EVENT_WAL_SENDER_WRITE_DATA WalSenderWriteData "Waiting for any activity when processing replies from WAL receiver in WAL sender process."
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#
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# Wait Events - IPC
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#
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# Use this category when a process cannot complete the work it is doing because
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# it is waiting for a notification from another process.
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#
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Section: ClassName - WaitEventIPC
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WAIT_EVENT_APPEND_READY AppendReady "Waiting for subplan nodes of an <literal>Append</literal> plan node to be ready."
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WAIT_EVENT_ARCHIVE_CLEANUP_COMMAND ArchiveCleanupCommand "Waiting for <xref linkend="guc-archive-cleanup-command"/> to complete."
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WAIT_EVENT_ARCHIVE_COMMAND ArchiveCommand "Waiting for <xref linkend="guc-archive-command"/> to complete."
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WAIT_EVENT_BACKEND_TERMINATION BackendTermination "Waiting for the termination of another backend."
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WAIT_EVENT_BACKUP_WAIT_WAL_ARCHIVE BackupWaitWalArchive "Waiting for WAL files required for a backup to be successfully archived."
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WAIT_EVENT_BGWORKER_SHUTDOWN BgWorkerShutdown "Waiting for background worker to shut down."
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WAIT_EVENT_BGWORKER_STARTUP BgWorkerStartup "Waiting for background worker to start up."
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WAIT_EVENT_BTREE_PAGE BtreePage "Waiting for the page number needed to continue a parallel B-tree scan to become available."
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WAIT_EVENT_BUFFER_IO BufferIO "Waiting for buffer I/O to complete."
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WAIT_EVENT_CHECKPOINT_DONE CheckpointDone "Waiting for a checkpoint to complete."
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WAIT_EVENT_CHECKPOINT_START CheckpointStart "Waiting for a checkpoint to start."
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WAIT_EVENT_EXECUTE_GATHER ExecuteGather "Waiting for activity from a child process while executing a <literal>Gather</literal> plan node."
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WAIT_EVENT_HASH_BATCH_ALLOCATE HashBatchAllocate "Waiting for an elected Parallel Hash participant to allocate a hash table."
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WAIT_EVENT_HASH_BATCH_ELECT HashBatchElect "Waiting to elect a Parallel Hash participant to allocate a hash table."
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WAIT_EVENT_HASH_BATCH_LOAD HashBatchLoad "Waiting for other Parallel Hash participants to finish loading a hash table."
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WAIT_EVENT_HASH_BUILD_ALLOCATE HashBuildAllocate "Waiting for an elected Parallel Hash participant to allocate the initial hash table."
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WAIT_EVENT_HASH_BUILD_ELECT HashBuildElect "Waiting to elect a Parallel Hash participant to allocate the initial hash table."
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WAIT_EVENT_HASH_BUILD_HASH_INNER HashBuildHashInner "Waiting for other Parallel Hash participants to finish hashing the inner relation."
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WAIT_EVENT_HASH_BUILD_HASH_OUTER HashBuildHashOuter "Waiting for other Parallel Hash participants to finish partitioning the outer relation."
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WAIT_EVENT_HASH_GROW_BATCHES_DECIDE HashGrowBatchesDecide "Waiting to elect a Parallel Hash participant to decide on future batch growth."
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WAIT_EVENT_HASH_GROW_BATCHES_ELECT HashGrowBatchesElect "Waiting to elect a Parallel Hash participant to allocate more batches."
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WAIT_EVENT_HASH_GROW_BATCHES_FINISH HashGrowBatchesFinish "Waiting for an elected Parallel Hash participant to decide on future batch growth."
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WAIT_EVENT_HASH_GROW_BATCHES_REALLOCATE HashGrowBatchesReallocate "Waiting for an elected Parallel Hash participant to allocate more batches."
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WAIT_EVENT_HASH_GROW_BATCHES_REPARTITION HashGrowBatchesRepartition "Waiting for other Parallel Hash participants to finish repartitioning."
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WAIT_EVENT_HASH_GROW_BUCKETS_ELECT HashGrowBucketsElect "Waiting to elect a Parallel Hash participant to allocate more buckets."
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WAIT_EVENT_HASH_GROW_BUCKETS_REALLOCATE HashGrowBucketsReallocate "Waiting for an elected Parallel Hash participant to finish allocating more buckets."
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WAIT_EVENT_HASH_GROW_BUCKETS_REINSERT HashGrowBucketsReinsert "Waiting for other Parallel Hash participants to finish inserting tuples into new buckets."
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WAIT_EVENT_LOGICAL_APPLY_SEND_DATA LogicalApplySendData "Waiting for a logical replication leader apply process to send data to a parallel apply process."
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WAIT_EVENT_LOGICAL_PARALLEL_APPLY_STATE_CHANGE LogicalParallelApplyStateChange "Waiting for a logical replication parallel apply process to change state."
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WAIT_EVENT_LOGICAL_SYNC_DATA LogicalSyncData "Waiting for a logical replication remote server to send data for initial table synchronization."
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WAIT_EVENT_LOGICAL_SYNC_STATE_CHANGE LogicalSyncStateChange "Waiting for a logical replication remote server to change state."
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WAIT_EVENT_MQ_INTERNAL MessageQueueInternal "Waiting for another process to be attached to a shared message queue."
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WAIT_EVENT_MQ_PUT_MESSAGE MessageQueuePutMessage "Waiting to write a protocol message to a shared message queue."
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WAIT_EVENT_MQ_RECEIVE MessageQueueReceive "Waiting to receive bytes from a shared message queue."
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WAIT_EVENT_MQ_SEND MessageQueueSend "Waiting to send bytes to a shared message queue."
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WAIT_EVENT_PARALLEL_BITMAP_SCAN ParallelBitmapScan "Waiting for parallel bitmap scan to become initialized."
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WAIT_EVENT_PARALLEL_CREATE_INDEX_SCAN ParallelCreateIndexScan "Waiting for parallel <command>CREATE INDEX</command> workers to finish heap scan."
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WAIT_EVENT_PARALLEL_FINISH ParallelFinish "Waiting for parallel workers to finish computing."
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WAIT_EVENT_PROCARRAY_GROUP_UPDATE ProcArrayGroupUpdate "Waiting for the group leader to clear the transaction ID at end of a parallel operation."
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WAIT_EVENT_PROC_SIGNAL_BARRIER ProcSignalBarrier "Waiting for a barrier event to be processed by all backends."
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WAIT_EVENT_PROMOTE Promote "Waiting for standby promotion."
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WAIT_EVENT_RECOVERY_CONFLICT_SNAPSHOT RecoveryConflictSnapshot "Waiting for recovery conflict resolution for a vacuum cleanup."
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WAIT_EVENT_RECOVERY_CONFLICT_TABLESPACE RecoveryConflictTablespace "Waiting for recovery conflict resolution for dropping a tablespace."
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WAIT_EVENT_RECOVERY_END_COMMAND RecoveryEndCommand "Waiting for <xref linkend="guc-recovery-end-command"/> to complete."
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WAIT_EVENT_RECOVERY_PAUSE RecoveryPause "Waiting for recovery to be resumed."
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WAIT_EVENT_REPLICATION_ORIGIN_DROP ReplicationOriginDrop "Waiting for a replication origin to become inactive so it can be dropped."
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WAIT_EVENT_REPLICATION_SLOT_DROP ReplicationSlotDrop "Waiting for a replication slot to become inactive so it can be dropped."
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WAIT_EVENT_RESTORE_COMMAND RestoreCommand "Waiting for <xref linkend="guc-restore-command"/> to complete."
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WAIT_EVENT_SAFE_SNAPSHOT SafeSnapshot "Waiting to obtain a valid snapshot for a <literal>READ ONLY DEFERRABLE</literal> transaction."
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WAIT_EVENT_SYNC_REP SyncRep "Waiting for confirmation from a remote server during synchronous replication."
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WAIT_EVENT_WAL_RECEIVER_EXIT WalReceiverExit "Waiting for the WAL receiver to exit."
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WAIT_EVENT_WAL_RECEIVER_WAIT_START WalReceiverWaitStart "Waiting for startup process to send initial data for streaming replication."
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WAIT_EVENT_XACT_GROUP_UPDATE XactGroupUpdate "Waiting for the group leader to update transaction status at end of a parallel operation."
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#
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# Wait Events - Timeout
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#
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# Use this category when a process is waiting for a timeout to expire.
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#
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Section: ClassName - WaitEventTimeout
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WAIT_EVENT_BASE_BACKUP_THROTTLE BaseBackupThrottle "Waiting during base backup when throttling activity."
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WAIT_EVENT_CHECKPOINT_WRITE_DELAY CheckpointWriteDelay "Waiting between writes while performing a checkpoint."
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WAIT_EVENT_PG_SLEEP PgSleep "Waiting due to a call to <function>pg_sleep</function> or a sibling function."
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WAIT_EVENT_RECOVERY_APPLY_DELAY RecoveryApplyDelay "Waiting to apply WAL during recovery because of a delay setting."
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WAIT_EVENT_RECOVERY_RETRIEVE_RETRY_INTERVAL RecoveryRetrieveRetryInterval "Waiting during recovery when WAL data is not available from any source (<filename>pg_wal</filename>, archive or stream)."
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WAIT_EVENT_REGISTER_SYNC_REQUEST RegisterSyncRequest "Waiting while sending synchronization requests to the checkpointer, because the request queue is full."
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WAIT_EVENT_SPIN_DELAY SpinDelay "Waiting while acquiring a contended spinlock."
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WAIT_EVENT_VACUUM_DELAY VacuumDelay "Waiting in a cost-based vacuum delay point."
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WAIT_EVENT_VACUUM_TRUNCATE VacuumTruncate "Waiting to acquire an exclusive lock to truncate off any empty pages at the end of a table vacuumed."
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#
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# Wait Events - IO
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#
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# Use this category when a process is waiting for a IO.
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#
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Section: ClassName - WaitEventIO
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WAIT_EVENT_BASEBACKUP_READ BaseBackupRead "Waiting for base backup to read from a file."
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WAIT_EVENT_BASEBACKUP_SYNC BaseBackupSync "Waiting for data written by a base backup to reach durable storage."
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WAIT_EVENT_BASEBACKUP_WRITE BaseBackupWrite "Waiting for base backup to write to a file."
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WAIT_EVENT_BUFFILE_READ BufFileRead "Waiting for a read from a buffered file."
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WAIT_EVENT_BUFFILE_WRITE BufFileWrite "Waiting for a write to a buffered file."
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WAIT_EVENT_BUFFILE_TRUNCATE BufFileTruncate "Waiting for a buffered file to be truncated."
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WAIT_EVENT_CONTROL_FILE_READ ControlFileRead "Waiting for a read from the <filename>pg_control</filename> file."
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WAIT_EVENT_CONTROL_FILE_SYNC ControlFileSync "Waiting for the <filename>pg_control</filename> file to reach durable storage."
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WAIT_EVENT_CONTROL_FILE_SYNC_UPDATE ControlFileSyncUpdate "Waiting for an update to the <filename>pg_control</filename> file to reach durable storage."
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WAIT_EVENT_CONTROL_FILE_WRITE ControlFileWrite "Waiting for a write to the <filename>pg_control</filename> file."
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WAIT_EVENT_CONTROL_FILE_WRITE_UPDATE ControlFileWriteUpdate "Waiting for a write to update the <filename>pg_control</filename> file."
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WAIT_EVENT_COPY_FILE_READ CopyFileRead "Waiting for a read during a file copy operation."
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WAIT_EVENT_COPY_FILE_WRITE CopyFileWrite "Waiting for a write during a file copy operation."
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WAIT_EVENT_DATA_FILE_EXTEND DataFileExtend "Waiting for a relation data file to be extended."
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WAIT_EVENT_DATA_FILE_FLUSH DataFileFlush "Waiting for a relation data file to reach durable storage."
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WAIT_EVENT_DATA_FILE_IMMEDIATE_SYNC DataFileImmediateSync "Waiting for an immediate synchronization of a relation data file to durable storage."
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WAIT_EVENT_DATA_FILE_PREFETCH DataFilePrefetch "Waiting for an asynchronous prefetch from a relation data file."
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WAIT_EVENT_DATA_FILE_READ DataFileRead "Waiting for a read from a relation data file."
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WAIT_EVENT_DATA_FILE_SYNC DataFileSync "Waiting for changes to a relation data file to reach durable storage."
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WAIT_EVENT_DATA_FILE_TRUNCATE DataFileTruncate "Waiting for a relation data file to be truncated."
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WAIT_EVENT_DATA_FILE_WRITE DataFileWrite "Waiting for a write to a relation data file."
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WAIT_EVENT_DSM_ALLOCATE DSMAllocate "Waiting for a dynamic shared memory segment to be allocated."
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WAIT_EVENT_DSM_FILL_ZERO_WRITE DSMFillZeroWrite "Waiting to fill a dynamic shared memory backing file with zeroes."
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WAIT_EVENT_LOCK_FILE_ADDTODATADIR_READ LockFileAddToDataDirRead "Waiting for a read while adding a line to the data directory lock file."
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WAIT_EVENT_LOCK_FILE_ADDTODATADIR_SYNC LockFileAddToDataDirSync "Waiting for data to reach durable storage while adding a line to the data directory lock file."
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WAIT_EVENT_LOCK_FILE_ADDTODATADIR_WRITE LockFileAddToDataDirWrite "Waiting for a write while adding a line to the data directory lock file."
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WAIT_EVENT_LOCK_FILE_CREATE_READ LockFileCreateRead "Waiting to read while creating the data directory lock file."
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WAIT_EVENT_LOCK_FILE_CREATE_SYNC LockFileCreateSync "Waiting for data to reach durable storage while creating the data directory lock file."
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WAIT_EVENT_LOCK_FILE_CREATE_WRITE LockFileCreateWrite "Waiting for a write while creating the data directory lock file."
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WAIT_EVENT_LOCK_FILE_RECHECKDATADIR_READ LockFileReCheckDataDirRead "Waiting for a read during recheck of the data directory lock file."
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WAIT_EVENT_LOGICAL_REWRITE_CHECKPOINT_SYNC LogicalRewriteCheckpointSync "Waiting for logical rewrite mappings to reach durable storage during a checkpoint."
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WAIT_EVENT_LOGICAL_REWRITE_MAPPING_SYNC LogicalRewriteMappingSync "Waiting for mapping data to reach durable storage during a logical rewrite."
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WAIT_EVENT_LOGICAL_REWRITE_MAPPING_WRITE LogicalRewriteMappingWrite "Waiting for a write of mapping data during a logical rewrite."
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WAIT_EVENT_LOGICAL_REWRITE_SYNC LogicalRewriteSync "Waiting for logical rewrite mappings to reach durable storage."
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WAIT_EVENT_LOGICAL_REWRITE_TRUNCATE LogicalRewriteTruncate "Waiting for truncate of mapping data during a logical rewrite."
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WAIT_EVENT_LOGICAL_REWRITE_WRITE LogicalRewriteWrite "Waiting for a write of logical rewrite mappings."
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WAIT_EVENT_RELATION_MAP_READ RelationMapRead "Waiting for a read of the relation map file."
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WAIT_EVENT_RELATION_MAP_REPLACE RelationMapReplace "Waiting for durable replacement of a relation map file."
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WAIT_EVENT_RELATION_MAP_WRITE RelationMapWrite "Waiting for a write to the relation map file."
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WAIT_EVENT_REORDER_BUFFER_READ ReorderBufferRead "Waiting for a read during reorder buffer management."
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WAIT_EVENT_REORDER_BUFFER_WRITE ReorderBufferWrite "Waiting for a write during reorder buffer management."
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WAIT_EVENT_REORDER_LOGICAL_MAPPING_READ ReorderLogicalMappingRead "Waiting for a read of a logical mapping during reorder buffer management."
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WAIT_EVENT_REPLICATION_SLOT_READ ReplicationSlotRead "Waiting for a read from a replication slot control file."
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WAIT_EVENT_REPLICATION_SLOT_RESTORE_SYNC ReplicationSlotRestoreSync "Waiting for a replication slot control file to reach durable storage while restoring it to memory."
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WAIT_EVENT_REPLICATION_SLOT_SYNC ReplicationSlotSync "Waiting for a replication slot control file to reach durable storage."
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WAIT_EVENT_REPLICATION_SLOT_WRITE ReplicationSlotWrite "Waiting for a write to a replication slot control file."
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WAIT_EVENT_SLRU_FLUSH_SYNC SLRUFlushSync "Waiting for SLRU data to reach durable storage during a checkpoint or database shutdown."
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WAIT_EVENT_SLRU_READ SLRURead "Waiting for a read of an SLRU page."
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WAIT_EVENT_SLRU_SYNC SLRUSync "Waiting for SLRU data to reach durable storage following a page write."
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WAIT_EVENT_SLRU_WRITE SLRUWrite "Waiting for a write of an SLRU page."
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WAIT_EVENT_SNAPBUILD_READ SnapbuildRead "Waiting for a read of a serialized historical catalog snapshot."
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WAIT_EVENT_SNAPBUILD_SYNC SnapbuildSync "Waiting for a serialized historical catalog snapshot to reach durable storage."
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WAIT_EVENT_SNAPBUILD_WRITE SnapbuildWrite "Waiting for a write of a serialized historical catalog snapshot."
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WAIT_EVENT_TIMELINE_HISTORY_FILE_SYNC TimelineHistoryFileSync "Waiting for a timeline history file received via streaming replication to reach durable storage."
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WAIT_EVENT_TIMELINE_HISTORY_FILE_WRITE TimelineHistoryFileWrite "Waiting for a write of a timeline history file received via streaming replication."
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WAIT_EVENT_TIMELINE_HISTORY_READ TimelineHistoryRead "Waiting for a read of a timeline history file."
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WAIT_EVENT_TIMELINE_HISTORY_SYNC TimelineHistorySync "Waiting for a newly created timeline history file to reach durable storage."
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WAIT_EVENT_TIMELINE_HISTORY_WRITE TimelineHistoryWrite "Waiting for a write of a newly created timeline history file."
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WAIT_EVENT_TWOPHASE_FILE_READ TwophaseFileRead "Waiting for a read of a two phase state file."
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WAIT_EVENT_TWOPHASE_FILE_SYNC TwophaseFileSync "Waiting for a two phase state file to reach durable storage."
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WAIT_EVENT_TWOPHASE_FILE_WRITE TwophaseFileWrite "Waiting for a write of a two phase state file."
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WAIT_EVENT_VERSION_FILE_WRITE VersionFileWrite "Waiting for the version file to be written while creating a database."
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WAIT_EVENT_WALSENDER_TIMELINE_HISTORY_READ WALSenderTimelineHistoryRead "Waiting for a read from a timeline history file during a walsender timeline command."
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WAIT_EVENT_WAL_BOOTSTRAP_SYNC WALBootstrapSync "Waiting for WAL to reach durable storage during bootstrapping."
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WAIT_EVENT_WAL_BOOTSTRAP_WRITE WALBootstrapWrite "Waiting for a write of a WAL page during bootstrapping."
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WAIT_EVENT_WAL_COPY_READ WALCopyRead "Waiting for a read when creating a new WAL segment by copying an existing one."
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WAIT_EVENT_WAL_COPY_SYNC WALCopySync "Waiting for a new WAL segment created by copying an existing one to reach durable storage."
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WAIT_EVENT_WAL_COPY_WRITE WALCopyWrite "Waiting for a write when creating a new WAL segment by copying an existing one."
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WAIT_EVENT_WAL_INIT_SYNC WALInitSync "Waiting for a newly initialized WAL file to reach durable storage."
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WAIT_EVENT_WAL_INIT_WRITE WALInitWrite "Waiting for a write while initializing a new WAL file."
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WAIT_EVENT_WAL_READ WALRead "Waiting for a read from a WAL file."
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WAIT_EVENT_WAL_SYNC WALSync "Waiting for a WAL file to reach durable storage."
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WAIT_EVENT_WAL_SYNC_METHOD_ASSIGN WALSyncMethodAssign "Waiting for data to reach durable storage while assigning a new WAL sync method."
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WAIT_EVENT_WAL_WRITE WALWrite "Waiting for a write to a WAL file."
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#
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# Wait events - Buffer Pin
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#
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Section: ClassName - WaitEventBufferPin
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WAIT_EVENT_BUFFER_PIN BufferPin "Waiting to acquire an exclusive pin on a buffer."
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#
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# Wait events - Extension
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#
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Section: ClassName - WaitEventExtension
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WAIT_EVENT_DOCONLY Extension "Waiting in an extension."
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#
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# Wait events - LWLock
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#
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# This class of wait events has its own set of C structure, so these are
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# only used for the documentation.
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#
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Section: ClassName - WaitEventLWLock
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WAIT_EVENT_DOCONLY ShmemIndex "Waiting to find or allocate space in shared memory."
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WAIT_EVENT_DOCONLY OidGen "Waiting to allocate a new OID."
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WAIT_EVENT_DOCONLY XidGen "Waiting to allocate a new transaction ID."
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WAIT_EVENT_DOCONLY ProcArray "Waiting to access the shared per-process data structures (typically, to get a snapshot or report a session's transaction ID)."
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WAIT_EVENT_DOCONLY SInvalRead "Waiting to retrieve messages from the shared catalog invalidation queue."
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WAIT_EVENT_DOCONLY SInvalWrite "Waiting to add a message to the shared catalog invalidation queue."
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WAIT_EVENT_DOCONLY WALBufMapping "Waiting to replace a page in WAL buffers."
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WAIT_EVENT_DOCONLY WALWrite "Waiting for WAL buffers to be written to disk."
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WAIT_EVENT_DOCONLY ControlFile "Waiting to read or update the <filename>pg_control</filename> file or create a new WAL file."
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WAIT_EVENT_DOCONLY XactSLRU "Waiting to access the transaction status SLRU cache."
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WAIT_EVENT_DOCONLY SubtransSLRU "Waiting to access the sub-transaction SLRU cache."
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WAIT_EVENT_DOCONLY MultiXactGen "Waiting to read or update shared multixact state."
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WAIT_EVENT_DOCONLY MultiXactOffsetSLRU "Waiting to access the multixact offset SLRU cache."
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WAIT_EVENT_DOCONLY MultiXactMemberSLRU "Waiting to access the multixact member SLRU cache."
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WAIT_EVENT_DOCONLY RelCacheInit "Waiting to read or update a <filename>pg_internal.init</filename> relation cache initialization file."
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WAIT_EVENT_DOCONLY CheckpointerComm "Waiting to manage fsync requests."
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WAIT_EVENT_DOCONLY TwoPhaseState "Waiting to read or update the state of prepared transactions."
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WAIT_EVENT_DOCONLY TablespaceCreate "Waiting to create or drop a tablespace."
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WAIT_EVENT_DOCONLY BtreeVacuum "Waiting to read or update vacuum-related information for a B-tree index."
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WAIT_EVENT_DOCONLY AddinShmemInit "Waiting to manage an extension's space allocation in shared memory."
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WAIT_EVENT_DOCONLY Autovacuum "Waiting to read or update the current state of autovacuum workers."
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WAIT_EVENT_DOCONLY AutovacuumSchedule "Waiting to ensure that a table selected for autovacuum still needs vacuuming."
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WAIT_EVENT_DOCONLY SyncScan "Waiting to select the starting location of a synchronized table scan."
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WAIT_EVENT_DOCONLY RelationMapping "Waiting to read or update a <filename>pg_filenode.map</filename> file (used to track the filenode assignments of certain system catalogs)."
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WAIT_EVENT_DOCONLY NotifySLRU "Waiting to access the <command>NOTIFY</command> message SLRU cache."
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WAIT_EVENT_DOCONLY NotifyQueue "Waiting to read or update <command>NOTIFY</command> messages."
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WAIT_EVENT_DOCONLY SerializableXactHash "Waiting to read or update information about serializable transactions."
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WAIT_EVENT_DOCONLY SerializableFinishedList "Waiting to access the list of finished serializable transactions."
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WAIT_EVENT_DOCONLY SerializablePredicateList "Waiting to access the list of predicate locks held by serializable transactions."
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WAIT_EVENT_DOCONLY SerialSLRU "Waiting to access the serializable transaction conflict SLRU cache."
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WAIT_EVENT_DOCONLY SyncRep "Waiting to read or update information about the state of synchronous replication."
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WAIT_EVENT_DOCONLY BackgroundWorker "Waiting to read or update background worker state."
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WAIT_EVENT_DOCONLY DynamicSharedMemoryControl "Waiting to read or update dynamic shared memory allocation information."
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WAIT_EVENT_DOCONLY AutoFile "Waiting to update the <filename>postgresql.auto.conf</filename> file."
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WAIT_EVENT_DOCONLY ReplicationSlotAllocation "Waiting to allocate or free a replication slot."
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WAIT_EVENT_DOCONLY ReplicationSlotControl "Waiting to read or update replication slot state."
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WAIT_EVENT_DOCONLY CommitTsSLRU "Waiting to access the commit timestamp SLRU cache."
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WAIT_EVENT_DOCONLY CommitTs "Waiting to read or update the last value set for a transaction commit timestamp."
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WAIT_EVENT_DOCONLY ReplicationOrigin "Waiting to create, drop or use a replication origin."
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WAIT_EVENT_DOCONLY MultiXactTruncation "Waiting to read or truncate multixact information."
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WAIT_EVENT_DOCONLY OldSnapshotTimeMap "Waiting to read or update old snapshot control information."
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WAIT_EVENT_DOCONLY LogicalRepWorker "Waiting to read or update the state of logical replication workers."
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WAIT_EVENT_DOCONLY XactTruncation "Waiting to execute <function>pg_xact_status</function> or update the oldest transaction ID available to it."
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WAIT_EVENT_DOCONLY WrapLimitsVacuum "Waiting to update limits on transaction id and multixact consumption."
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WAIT_EVENT_DOCONLY NotifyQueueTail "Waiting to update limit on <command>NOTIFY</command> message storage."
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WAIT_EVENT_DOCONLY WaitEventExtension "Waiting to read or update custom wait events information for extensions."
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WAIT_EVENT_DOCONLY XactBuffer "Waiting for I/O on a transaction status SLRU buffer."
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WAIT_EVENT_DOCONLY CommitTsBuffer "Waiting for I/O on a commit timestamp SLRU buffer."
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WAIT_EVENT_DOCONLY SubtransBuffer "Waiting for I/O on a sub-transaction SLRU buffer."
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WAIT_EVENT_DOCONLY MultiXactOffsetBuffer "Waiting for I/O on a multixact offset SLRU buffer."
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WAIT_EVENT_DOCONLY MultiXactMemberBuffer "Waiting for I/O on a multixact member SLRU buffer."
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WAIT_EVENT_DOCONLY NotifyBuffer "Waiting for I/O on a <command>NOTIFY</command> message SLRU buffer."
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WAIT_EVENT_DOCONLY SerialBuffer "Waiting for I/O on a serializable transaction conflict SLRU buffer."
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WAIT_EVENT_DOCONLY WALInsert "Waiting to insert WAL data into a memory buffer."
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WAIT_EVENT_DOCONLY BufferContent "Waiting to access a data page in memory."
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WAIT_EVENT_DOCONLY ReplicationOriginState "Waiting to read or update the progress of one replication origin."
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WAIT_EVENT_DOCONLY ReplicationSlotIO "Waiting for I/O on a replication slot."
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WAIT_EVENT_DOCONLY LockFastPath "Waiting to read or update a process' fast-path lock information."
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WAIT_EVENT_DOCONLY BufferMapping "Waiting to associate a data block with a buffer in the buffer pool."
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WAIT_EVENT_DOCONLY LockManager "Waiting to read or update information about <quote>heavyweight</quote> locks."
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WAIT_EVENT_DOCONLY PredicateLockManager "Waiting to access predicate lock information used by serializable transactions."
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WAIT_EVENT_DOCONLY ParallelHashJoin "Waiting to synchronize workers during Parallel Hash Join plan execution."
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WAIT_EVENT_DOCONLY ParallelQueryDSA "Waiting for parallel query dynamic shared memory allocation."
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WAIT_EVENT_DOCONLY PerSessionDSA "Waiting for parallel query dynamic shared memory allocation."
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WAIT_EVENT_DOCONLY PerSessionRecordType "Waiting to access a parallel query's information about composite types."
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WAIT_EVENT_DOCONLY PerSessionRecordTypmod "Waiting to access a parallel query's information about type modifiers that identify anonymous record types."
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WAIT_EVENT_DOCONLY SharedTupleStore "Waiting to access a shared tuple store during parallel query."
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WAIT_EVENT_DOCONLY SharedTidBitmap "Waiting to access a shared TID bitmap during a parallel bitmap index scan."
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WAIT_EVENT_DOCONLY ParallelAppend "Waiting to choose the next subplan during Parallel Append plan execution."
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WAIT_EVENT_DOCONLY PerXactPredicateList "Waiting to access the list of predicate locks held by the current serializable transaction during a parallel query."
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WAIT_EVENT_DOCONLY PgStatsDSA "Waiting for stats dynamic shared memory allocator access."
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WAIT_EVENT_DOCONLY PgStatsHash "Waiting for stats shared memory hash table access."
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WAIT_EVENT_DOCONLY PgStatsData "Waiting for shared memory stats data access."
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WAIT_EVENT_DOCONLY LogicalRepLauncherDSA "Waiting to access logical replication launcher's dynamic shared memory allocator."
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WAIT_EVENT_DOCONLY LogicalRepLauncherHash "Waiting to access logical replication launcher's shared hash table."
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#
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# Wait even - Lock
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#
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# This class of wait events has its own set of C structure, so these are
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# only used for the documentation.
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#
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Section: ClassName - WaitEventLock
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WAIT_EVENT_DOCONLY relation "Waiting to acquire a lock on a relation."
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WAIT_EVENT_DOCONLY extend "Waiting to extend a relation."
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WAIT_EVENT_DOCONLY frozenid "Waiting to update <structname>pg_database</structname>.<structfield>datfrozenxid</structfield> and <structname>pg_database</structname>.<structfield>datminmxid</structfield>."
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WAIT_EVENT_DOCONLY page "Waiting to acquire a lock on a page of a relation."
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WAIT_EVENT_DOCONLY tuple "Waiting to acquire a lock on a tuple."
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WAIT_EVENT_DOCONLY transactionid "Waiting for a transaction to finish."
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WAIT_EVENT_DOCONLY virtualxid "Waiting to acquire a virtual transaction ID lock; see <xref linkend="transaction-id"/>."
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WAIT_EVENT_DOCONLY spectoken "Waiting to acquire a speculative insertion lock."
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WAIT_EVENT_DOCONLY object "Waiting to acquire a lock on a non-relation database object."
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WAIT_EVENT_DOCONLY userlock "Waiting to acquire a user lock."
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WAIT_EVENT_DOCONLY advisory "Waiting to acquire an advisory user lock."
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WAIT_EVENT_DOCONLY applytransaction "Waiting to acquire a lock on a remote transaction being applied by a logical replication subscriber."
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