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Rearrange vacuum-related bits in PGPROC as a bitmask, to better support 

having several of them.  Add two more flags: whether the process is
executing an ANALYZE, and whether a vacuum is for Xid wraparound (which
is obviously only set by autovacuum).

Sneakily move the worker's recently-acquired PostAuthDelay to a more useful
place.
This commit is contained in:
Alvaro Herrera 2007-10-24 20:55:36 +00:00
parent 3ef18797b8
commit 745c1b2c2a
7 changed files with 97 additions and 41 deletions
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5
src/backend/access/transam/twophase.c
View File

@ -7,7 +7,7 @@
* Portions Copyright (c) 1994, Regents of the University of California * Portions Copyright (c) 1994, Regents of the University of California
* *
* IDENTIFICATION * IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/access/transam/twophase.c,v 1.36 2007/09/21 16:32:19 tgl Exp $ * $PostgreSQL: pgsql/src/backend/access/transam/twophase.c,v 1.37 2007/10/24 20:55:36 alvherre Exp $
* *
* NOTES * NOTES
* Each global transaction is associated with a global transaction * Each global transaction is associated with a global transaction
@ -283,8 +283,7 @@ MarkAsPreparing(TransactionId xid, const char *gid,
gxact->proc.databaseId = databaseid; gxact->proc.databaseId = databaseid;
gxact->proc.roleId = owner; gxact->proc.roleId = owner;
gxact->proc.inCommit = false; gxact->proc.inCommit = false;
gxact->proc.inVacuum = false; gxact->proc.vacuumFlags = 0;
gxact->proc.isAutovacuum = false;
gxact->proc.lwWaiting = false; gxact->proc.lwWaiting = false;
gxact->proc.lwExclusive = false; gxact->proc.lwExclusive = false;
gxact->proc.lwWaitLink = NULL; gxact->proc.lwWaitLink = NULL;

16
src/backend/commands/analyze.c
View File

@ -8,7 +8,7 @@
* *
* *
* IDENTIFICATION * IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/commands/analyze.c,v 1.109 2007/09/24 03:12:23 tgl Exp $ * $PostgreSQL: pgsql/src/backend/commands/analyze.c,v 1.110 2007/10/24 20:55:36 alvherre Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
@ -31,6 +31,7 @@
#include "parser/parse_relation.h" #include "parser/parse_relation.h"
#include "pgstat.h" #include "pgstat.h"
#include "postmaster/autovacuum.h" #include "postmaster/autovacuum.h"
#include "storage/proc.h"
#include "utils/acl.h" #include "utils/acl.h"
#include "utils/datum.h" #include "utils/datum.h"
#include "utils/lsyscache.h" #include "utils/lsyscache.h"
@ -201,6 +202,11 @@ analyze_rel(Oid relid, VacuumStmt *vacstmt,
return; return;
} }
/* let others know what I'm doing */
LWLockAcquire(ProcArrayLock, LW_EXCLUSIVE);
MyProc->vacuumFlags |= PROC_IN_ANALYZE;
LWLockRelease(ProcArrayLock);
/* measure elapsed time iff autovacuum logging requires it */ /* measure elapsed time iff autovacuum logging requires it */
if (IsAutoVacuumWorkerProcess() && Log_autovacuum_min_duration >= 0) if (IsAutoVacuumWorkerProcess() && Log_autovacuum_min_duration >= 0)
{ {
@ -484,6 +490,14 @@ analyze_rel(Oid relid, VacuumStmt *vacstmt,
RelationGetRelationName(onerel), RelationGetRelationName(onerel),
pg_rusage_show(&ru0)))); pg_rusage_show(&ru0))));
} }
/*
* Reset my PGPROC flag. Note: we need this here, and not in vacuum_rel,
* because the vacuum flag is cleared by the end-of-xact code.
*/
LWLockAcquire(ProcArrayLock, LW_EXCLUSIVE);
MyProc->vacuumFlags &= ~PROC_IN_ANALYZE;
LWLockRelease(ProcArrayLock);
} }
/* /*

18
src/backend/commands/vacuum.c
View File

@ -13,7 +13,7 @@
* *
* *
* IDENTIFICATION * IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/commands/vacuum.c,v 1.359 2007/09/20 17:56:31 tgl Exp $ * $PostgreSQL: pgsql/src/backend/commands/vacuum.c,v 1.360 2007/10/24 20:55:36 alvherre Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
@ -660,9 +660,9 @@ vacuum_set_xid_limits(int freeze_min_age, bool sharedRel,
* fixed-size never-null columns, but these are. * fixed-size never-null columns, but these are.
* *
* Another reason for doing it this way is that when we are in a lazy * Another reason for doing it this way is that when we are in a lazy
* VACUUM and have inVacuum set, we mustn't do any updates --- somebody * VACUUM and have PROC_IN_VACUUM set, we mustn't do any updates ---
* vacuuming pg_class might think they could delete a tuple marked with * somebody vacuuming pg_class might think they could delete a tuple
* xmin = our xid. * marked with xmin = our xid.
* *
* This routine is shared by full VACUUM, lazy VACUUM, and stand-alone * This routine is shared by full VACUUM, lazy VACUUM, and stand-alone
* ANALYZE. * ANALYZE.
@ -987,9 +987,9 @@ vacuum_rel(Oid relid, VacuumStmt *vacstmt, char expected_relkind)
* During a lazy VACUUM we do not run any user-supplied functions, and * During a lazy VACUUM we do not run any user-supplied functions, and
* so it should be safe to not create a transaction snapshot. * so it should be safe to not create a transaction snapshot.
* *
* We can furthermore set the inVacuum flag, which lets other * We can furthermore set the PROC_IN_VACUUM flag, which lets other
* concurrent VACUUMs know that they can ignore this one while * concurrent VACUUMs know that they can ignore this one while
* determining their OldestXmin. (The reason we don't set inVacuum * determining their OldestXmin. (The reason we don't set it
* during a full VACUUM is exactly that we may have to run user- * during a full VACUUM is exactly that we may have to run user-
* defined functions for functional indexes, and we want to make sure * defined functions for functional indexes, and we want to make sure
* that if they use the snapshot set above, any tuples it requires * that if they use the snapshot set above, any tuples it requires
@ -997,12 +997,14 @@ vacuum_rel(Oid relid, VacuumStmt *vacstmt, char expected_relkind)
* depends on the contents of other tables is arguably broken, but we * depends on the contents of other tables is arguably broken, but we
* won't break it here by violating transaction semantics.) * won't break it here by violating transaction semantics.)
* *
* Note: the inVacuum flag remains set until CommitTransaction or * Note: this flag remains set until CommitTransaction or
* AbortTransaction. We don't want to clear it until we reset * AbortTransaction. We don't want to clear it until we reset
* MyProc->xid/xmin, else OldestXmin might appear to go backwards, * MyProc->xid/xmin, else OldestXmin might appear to go backwards,
* which is probably Not Good. * which is probably Not Good.
*/ */
MyProc->inVacuum = true; LWLockAcquire(ProcArrayLock, LW_EXCLUSIVE);
MyProc->vacuumFlags |= PROC_IN_VACUUM;
LWLockRelease(ProcArrayLock);
} }
/* /*

51
src/backend/postmaster/autovacuum.c
View File

@ -55,7 +55,7 @@
* *
* *
* IDENTIFICATION * IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/postmaster/autovacuum.c,v 1.62 2007/10/24 19:08:25 alvherre Exp $ * $PostgreSQL: pgsql/src/backend/postmaster/autovacuum.c,v 1.63 2007/10/24 20:55:36 alvherre Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
@ -172,6 +172,7 @@ typedef struct autovac_table
int at_freeze_min_age; int at_freeze_min_age;
int at_vacuum_cost_delay; int at_vacuum_cost_delay;
int at_vacuum_cost_limit; int at_vacuum_cost_limit;
bool at_wraparound;
} autovac_table; } autovac_table;
/*------------- /*-------------
@ -280,7 +281,7 @@ static autovac_table *table_recheck_autovac(Oid relid);
static void relation_needs_vacanalyze(Oid relid, Form_pg_autovacuum avForm, static void relation_needs_vacanalyze(Oid relid, Form_pg_autovacuum avForm,
Form_pg_class classForm, Form_pg_class classForm,
PgStat_StatTabEntry *tabentry, bool *dovacuum, PgStat_StatTabEntry *tabentry, bool *dovacuum,
bool *doanalyze); bool *doanalyze, bool *wraparound);
static void autovacuum_do_vac_analyze(Oid relid, bool dovacuum, static void autovacuum_do_vac_analyze(Oid relid, bool dovacuum,
bool doanalyze, int freeze_min_age, bool doanalyze, int freeze_min_age,
@ -1440,9 +1441,6 @@ AutoVacWorkerMain(int argc, char *argv[])
/* Identify myself via ps */ /* Identify myself via ps */
init_ps_display("autovacuum worker process", "", "", ""); init_ps_display("autovacuum worker process", "", "", "");
if (PostAuthDelay)
pg_usleep(PostAuthDelay * 1000000L);
SetProcessingMode(InitProcessing); SetProcessingMode(InitProcessing);
/* /*
@ -1601,6 +1599,9 @@ AutoVacWorkerMain(int argc, char *argv[])
ereport(DEBUG1, ereport(DEBUG1,
(errmsg("autovacuum: processing database \"%s\"", dbname))); (errmsg("autovacuum: processing database \"%s\"", dbname)));
if (PostAuthDelay)
pg_usleep(PostAuthDelay * 1000000L);
/* And do an appropriate amount of work */ /* And do an appropriate amount of work */
recentXid = ReadNewTransactionId(); recentXid = ReadNewTransactionId();
do_autovacuum(); do_autovacuum();
@ -2085,6 +2086,14 @@ next_worker:
/* clean up memory before each iteration */ /* clean up memory before each iteration */
MemoryContextResetAndDeleteChildren(PortalContext); MemoryContextResetAndDeleteChildren(PortalContext);
/* set the "vacuum for wraparound" flag in PGPROC */
if (tab->at_wraparound)
{
LWLockAcquire(ProcArrayLock, LW_EXCLUSIVE);
MyProc->vacuumFlags |= PROC_VACUUM_FOR_WRAPAROUND;
LWLockRelease(ProcArrayLock);
}
/* /*
* We will abort vacuuming the current table if something errors out, * We will abort vacuuming the current table if something errors out,
* and continue with the next one in schedule; in particular, this * and continue with the next one in schedule; in particular, this
@ -2119,6 +2128,7 @@ next_worker:
get_rel_name(tab->at_relid)); get_rel_name(tab->at_relid));
EmitErrorReport(); EmitErrorReport();
/* this resets the PGPROC flags too */
AbortOutOfAnyTransaction(); AbortOutOfAnyTransaction();
FlushErrorState(); FlushErrorState();
MemoryContextResetAndDeleteChildren(PortalContext); MemoryContextResetAndDeleteChildren(PortalContext);
@ -2129,6 +2139,14 @@ next_worker:
} }
PG_END_TRY(); PG_END_TRY();
/* reset my PGPROC flag */
if (tab->at_wraparound)
{
LWLockAcquire(ProcArrayLock, LW_EXCLUSIVE);
MyProc->vacuumFlags &= ~PROC_VACUUM_FOR_WRAPAROUND;
LWLockRelease(ProcArrayLock);
}
/* be tidy */ /* be tidy */
pfree(tab); pfree(tab);
@ -2223,9 +2241,10 @@ relation_check_autovac(Oid relid, Form_pg_class classForm,
{ {
bool dovacuum; bool dovacuum;
bool doanalyze; bool doanalyze;
bool dummy;
relation_needs_vacanalyze(relid, avForm, classForm, tabentry, relation_needs_vacanalyze(relid, avForm, classForm, tabentry,
&dovacuum, &doanalyze); &dovacuum, &doanalyze, &dummy);
if (classForm->relkind == RELKIND_TOASTVALUE) if (classForm->relkind == RELKIND_TOASTVALUE)
{ {
@ -2272,6 +2291,8 @@ table_recheck_autovac(Oid relid)
bool doit = false; bool doit = false;
PgStat_StatDBEntry *shared; PgStat_StatDBEntry *shared;
PgStat_StatDBEntry *dbentry; PgStat_StatDBEntry *dbentry;
bool wraparound,
toast_wraparound = false;
/* use fresh stats */ /* use fresh stats */
autovac_refresh_stats(); autovac_refresh_stats();
@ -2298,7 +2319,7 @@ table_recheck_autovac(Oid relid)
shared, dbentry); shared, dbentry);
relation_needs_vacanalyze(relid, avForm, classForm, tabentry, relation_needs_vacanalyze(relid, avForm, classForm, tabentry,
&dovacuum, &doanalyze); &dovacuum, &doanalyze, &wraparound);
/* OK, it needs vacuum by itself */ /* OK, it needs vacuum by itself */
if (dovacuum) if (dovacuum)
@ -2316,6 +2337,7 @@ table_recheck_autovac(Oid relid)
{ {
bool toast_dovacuum; bool toast_dovacuum;
bool toast_doanalyze; bool toast_doanalyze;
bool toast_wraparound;
Form_pg_class toastClassForm; Form_pg_class toastClassForm;
PgStat_StatTabEntry *toasttabentry; PgStat_StatTabEntry *toasttabentry;
@ -2325,9 +2347,10 @@ table_recheck_autovac(Oid relid)
shared, dbentry); shared, dbentry);
/* note we use the pg_autovacuum entry for the main table */ /* note we use the pg_autovacuum entry for the main table */
relation_needs_vacanalyze(toastrelid, avForm, toastClassForm, relation_needs_vacanalyze(toastrelid, avForm,
toasttabentry, &toast_dovacuum, toastClassForm, toasttabentry,
&toast_doanalyze); &toast_dovacuum, &toast_doanalyze,
&toast_wraparound);
/* we only consider VACUUM for toast tables */ /* we only consider VACUUM for toast tables */
if (toast_dovacuum) if (toast_dovacuum)
{ {
@ -2389,6 +2412,7 @@ table_recheck_autovac(Oid relid)
tab->at_freeze_min_age = freeze_min_age; tab->at_freeze_min_age = freeze_min_age;
tab->at_vacuum_cost_limit = vac_cost_limit; tab->at_vacuum_cost_limit = vac_cost_limit;
tab->at_vacuum_cost_delay = vac_cost_delay; tab->at_vacuum_cost_delay = vac_cost_delay;
tab->at_wraparound = wraparound || toast_wraparound;
} }
heap_close(avRel, AccessShareLock); heap_close(avRel, AccessShareLock);
@ -2403,7 +2427,8 @@ table_recheck_autovac(Oid relid)
* relation_needs_vacanalyze * relation_needs_vacanalyze
* *
* Check whether a relation needs to be vacuumed or analyzed; return each into * Check whether a relation needs to be vacuumed or analyzed; return each into
* "dovacuum" and "doanalyze", respectively. avForm and tabentry can be NULL, * "dovacuum" and "doanalyze", respectively. Also return whether the vacuum is
* being forced because of Xid wraparound. avForm and tabentry can be NULL,
* classForm shouldn't. * classForm shouldn't.
* *
* A table needs to be vacuumed if the number of dead tuples exceeds a * A table needs to be vacuumed if the number of dead tuples exceeds a
@ -2437,7 +2462,8 @@ relation_needs_vacanalyze(Oid relid,
PgStat_StatTabEntry *tabentry, PgStat_StatTabEntry *tabentry,
/* output params below */ /* output params below */
bool *dovacuum, bool *dovacuum,
bool *doanalyze) bool *doanalyze,
bool *wraparound)
{ {
bool force_vacuum; bool force_vacuum;
float4 reltuples; /* pg_class.reltuples */ float4 reltuples; /* pg_class.reltuples */
@ -2499,6 +2525,7 @@ relation_needs_vacanalyze(Oid relid,
force_vacuum = (TransactionIdIsNormal(classForm->relfrozenxid) && force_vacuum = (TransactionIdIsNormal(classForm->relfrozenxid) &&
TransactionIdPrecedes(classForm->relfrozenxid, TransactionIdPrecedes(classForm->relfrozenxid,
xidForceLimit)); xidForceLimit));
*wraparound = force_vacuum;
/* User disabled it in pg_autovacuum? (But ignore if at risk) */ /* User disabled it in pg_autovacuum? (But ignore if at risk) */
if (avForm && !avForm->enabled && !force_vacuum) if (avForm && !avForm->enabled && !force_vacuum)

23
src/backend/storage/ipc/procarray.c
View File

@ -23,7 +23,7 @@
* *
* *
* IDENTIFICATION * IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/storage/ipc/procarray.c,v 1.35 2007/09/23 18:50:38 tgl Exp $ * $PostgreSQL: pgsql/src/backend/storage/ipc/procarray.c,v 1.36 2007/10/24 20:55:36 alvherre Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
@ -242,7 +242,8 @@ ProcArrayEndTransaction(PGPROC *proc, TransactionId latestXid)
proc->xid = InvalidTransactionId; proc->xid = InvalidTransactionId;
proc->lxid = InvalidLocalTransactionId; proc->lxid = InvalidLocalTransactionId;
proc->xmin = InvalidTransactionId; proc->xmin = InvalidTransactionId;
proc->inVacuum = false; /* must be cleared with xid/xmin */ /* must be cleared with xid/xmin: */
proc->vacuumFlags &= ~PROC_VACUUM_STATE_MASK;
proc->inCommit = false; /* be sure this is cleared in abort */ proc->inCommit = false; /* be sure this is cleared in abort */
/* Clear the subtransaction-XID cache too while holding the lock */ /* Clear the subtransaction-XID cache too while holding the lock */
@ -267,7 +268,8 @@ ProcArrayEndTransaction(PGPROC *proc, TransactionId latestXid)
proc->lxid = InvalidLocalTransactionId; proc->lxid = InvalidLocalTransactionId;
proc->xmin = InvalidTransactionId; proc->xmin = InvalidTransactionId;
proc->inVacuum = false; /* must be cleared with xid/xmin */ /* must be cleared with xid/xmin: */
proc->vacuumFlags &= ~PROC_VACUUM_STATE_MASK;
proc->inCommit = false; /* be sure this is cleared in abort */ proc->inCommit = false; /* be sure this is cleared in abort */
Assert(proc->subxids.nxids == 0); Assert(proc->subxids.nxids == 0);
@ -296,8 +298,10 @@ ProcArrayClearTransaction(PGPROC *proc)
proc->xid = InvalidTransactionId; proc->xid = InvalidTransactionId;
proc->lxid = InvalidLocalTransactionId; proc->lxid = InvalidLocalTransactionId;
proc->xmin = InvalidTransactionId; proc->xmin = InvalidTransactionId;
proc->inVacuum = false; /* redundant, but just in case */
proc->inCommit = false; /* ditto */ /* redundant, but just in case */
proc->vacuumFlags &= ~PROC_VACUUM_STATE_MASK;
proc->inCommit = false;
/* Clear the subtransaction-XID cache too */ /* Clear the subtransaction-XID cache too */
proc->subxids.nxids = 0; proc->subxids.nxids = 0;
@ -546,7 +550,8 @@ TransactionIdIsActive(TransactionId xid)
* If allDbs is TRUE then all backends are considered; if allDbs is FALSE * If allDbs is TRUE then all backends are considered; if allDbs is FALSE
* then only backends running in my own database are considered. * then only backends running in my own database are considered.
* *
* If ignoreVacuum is TRUE then backends with inVacuum set are ignored. * If ignoreVacuum is TRUE then backends with the PROC_IN_VACUUM flag set are
* ignored.
* *
* This is used by VACUUM to decide which deleted tuples must be preserved * This is used by VACUUM to decide which deleted tuples must be preserved
* in a table. allDbs = TRUE is needed for shared relations, but allDbs = * in a table. allDbs = TRUE is needed for shared relations, but allDbs =
@ -586,7 +591,7 @@ GetOldestXmin(bool allDbs, bool ignoreVacuum)
{ {
volatile PGPROC *proc = arrayP->procs[index]; volatile PGPROC *proc = arrayP->procs[index];
if (ignoreVacuum && proc->inVacuum) if (ignoreVacuum && (proc->vacuumFlags & PROC_IN_VACUUM))
continue; continue;
if (allDbs || proc->databaseId == MyDatabaseId) if (allDbs || proc->databaseId == MyDatabaseId)
@ -723,7 +728,7 @@ GetSnapshotData(Snapshot snapshot, bool serializable)
TransactionId xid; TransactionId xid;
/* Ignore procs running LAZY VACUUM */ /* Ignore procs running LAZY VACUUM */
if (proc->inVacuum) if (proc->vacuumFlags & PROC_IN_VACUUM)
continue; continue;
/* Update globalxmin to be the smallest valid xmin */ /* Update globalxmin to be the smallest valid xmin */
@ -1193,7 +1198,7 @@ CheckOtherDBBackends(Oid databaseId)
found = true; found = true;
if (proc->isAutovacuum) if (proc->vacuumFlags & PROC_IS_AUTOVACUUM)
{ {
/* an autovacuum --- send it SIGTERM before sleeping */ /* an autovacuum --- send it SIGTERM before sleeping */
int autopid = proc->pid; int autopid = proc->pid;

11
src/backend/storage/lmgr/proc.c
View File

@ -8,7 +8,7 @@
* *
* *
* IDENTIFICATION * IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/storage/lmgr/proc.c,v 1.194 2007/09/08 20:31:15 tgl Exp $ * $PostgreSQL: pgsql/src/backend/storage/lmgr/proc.c,v 1.195 2007/10/24 20:55:36 alvherre Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
@ -291,8 +291,9 @@ InitProcess(void)
MyProc->databaseId = InvalidOid; MyProc->databaseId = InvalidOid;
MyProc->roleId = InvalidOid; MyProc->roleId = InvalidOid;
MyProc->inCommit = false; MyProc->inCommit = false;
MyProc->inVacuum = false; MyProc->vacuumFlags = 0;
MyProc->isAutovacuum = IsAutoVacuumWorkerProcess(); if (IsAutoVacuumWorkerProcess())
MyProc->vacuumFlags |= PROC_IS_AUTOVACUUM;
MyProc->lwWaiting = false; MyProc->lwWaiting = false;
MyProc->lwExclusive = false; MyProc->lwExclusive = false;
MyProc->lwWaitLink = NULL; MyProc->lwWaitLink = NULL;
@ -429,8 +430,8 @@ InitAuxiliaryProcess(void)
MyProc->databaseId = InvalidOid; MyProc->databaseId = InvalidOid;
MyProc->roleId = InvalidOid; MyProc->roleId = InvalidOid;
MyProc->inCommit = false; MyProc->inCommit = false;
MyProc->inVacuum = false; /* we don't set the "is autovacuum" flag in the launcher */
MyProc->isAutovacuum = IsAutoVacuumLauncherProcess(); /* is this needed? */ MyProc->vacuumFlags = 0;
MyProc->lwWaiting = false; MyProc->lwWaiting = false;
MyProc->lwExclusive = false; MyProc->lwExclusive = false;
MyProc->lwWaitLink = NULL; MyProc->lwWaitLink = NULL;

14
src/include/storage/proc.h
View File

@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group * Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California * Portions Copyright (c) 1994, Regents of the University of California
* *
* $PostgreSQL: pgsql/src/include/storage/proc.h,v 1.100 2007/09/05 18:10:48 tgl Exp $ * $PostgreSQL: pgsql/src/include/storage/proc.h,v 1.101 2007/10/24 20:55:36 alvherre Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
@ -38,6 +38,15 @@ struct XidCache
TransactionId xids[PGPROC_MAX_CACHED_SUBXIDS]; TransactionId xids[PGPROC_MAX_CACHED_SUBXIDS];
}; };
/* Flags for PGPROC->vacuumFlags */
#define PROC_IS_AUTOVACUUM 0x01 /* is it an autovac worker? */
#define PROC_IN_VACUUM 0x02 /* currently running lazy vacuum */
#define PROC_IN_ANALYZE 0x04 /* currently running analyze */
#define PROC_VACUUM_FOR_WRAPAROUND 0x08 /* set by autovac only */
/* flags reset at EOXact */
#define PROC_VACUUM_STATE_MASK (0x0E)
/* /*
* Each backend has a PGPROC struct in shared memory. There is also a list of * Each backend has a PGPROC struct in shared memory. There is also a list of
* currently-unused PGPROC structs that will be reallocated to new backends. * currently-unused PGPROC structs that will be reallocated to new backends.
@ -82,8 +91,7 @@ struct PGPROC
bool inCommit; /* true if within commit critical section */ bool inCommit; /* true if within commit critical section */
bool inVacuum; /* true if current xact is a LAZY VACUUM */ uint8 vacuumFlags; /* vacuum-related flags, see above */
bool isAutovacuum; /* true if it's autovacuum */
/* Info about LWLock the process is currently waiting for, if any. */ /* Info about LWLock the process is currently waiting for, if any. */
bool lwWaiting; /* true if waiting for an LW lock */ bool lwWaiting; /* true if waiting for an LW lock */