The current implementation of dbsize doesn't handle tables in
tablespaces correctly, and is quite restricted on objects covered (only tables and databases, but not tablespaces and indexes). The attached patch contributes: - database_size(name) - relation_size(text) These are the well-known functions, tablespace-aware. - pg_tablespace_size(oid) - pg_database_size(oid) - pg_relation_size(oid) Tablespace-aware implementations, used by the upper functions. pg_relation_size will report sizes of indexes as well. - pg_size_pretty(bigint) Formatting of sizes, to display '146MB' instead of '152885668' Andreas Pflug
This commit is contained in:
Bruce Momjian
parent
e814e4bfe5
commit
528ac10c7c
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@ -1,157 +1,285 @@
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/*
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* dbsize.c
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* object size functions
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*
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* Copyright (c) 2004, PostgreSQL Global Development Group
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*
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* Author: Andreas Pflug <pgadmin@pse-consulting.de>
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/contrib/dbsize/dbsize.c,v 1.13 2004/09/02 00:55:22 momjian Exp $
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*
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*/
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#include "postgres.h"
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include "access/heapam.h"
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#include "catalog/catalog.h"
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#include "catalog/catname.h"
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#include "storage/fd.h"
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#include "utils/syscache.h"
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#include "utils/builtins.h"
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#include "catalog/namespace.h"
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#include "catalog/pg_tablespace.h"
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#include "commands/dbcommands.h"
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#include "fmgr.h"
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#include "storage/fd.h"
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#include "utils/builtins.h"
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#include "miscadmin.h"
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extern DLLIMPORT char *DataDir;
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Datum pg_tablespace_size(PG_FUNCTION_ARGS);
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Datum pg_database_size(PG_FUNCTION_ARGS);
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Datum pg_relation_size(PG_FUNCTION_ARGS);
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Datum pg_size_pretty(PG_FUNCTION_ARGS);
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Datum database_size(PG_FUNCTION_ARGS);
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Datum relation_size(PG_FUNCTION_ARGS);
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PG_FUNCTION_INFO_V1(pg_tablespace_size);
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PG_FUNCTION_INFO_V1(pg_database_size);
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PG_FUNCTION_INFO_V1(pg_relation_size);
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PG_FUNCTION_INFO_V1(pg_size_pretty);
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PG_FUNCTION_INFO_V1(database_size);
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PG_FUNCTION_INFO_V1(relation_size);
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static int64
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get_tablespace_size(Oid dbid, Oid spcid, bool baddirOK);
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static char *
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psnprintf(size_t len, const char *fmt,...)
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db_dir_size(char *path)
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{
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va_list ap;
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char *buf;
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int64 dirsize=0;
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struct dirent *direntry;
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DIR *dirdesc;
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char filename[MAXPGPATH];
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buf = palloc(len);
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dirdesc=AllocateDir(path);
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va_start(ap, fmt);
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vsnprintf(buf, len, fmt, ap);
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va_end(ap);
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if (!dirdesc)
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return 0;
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return buf;
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while ((direntry = readdir(dirdesc)) != 0)
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{
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struct stat fst;
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if (!strcmp(direntry->d_name, ".") || !strcmp(direntry->d_name, ".."))
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continue;
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snprintf(filename, MAXPGPATH, "%s/%s", path, direntry->d_name);
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if (stat(filename, &fst) < 0)
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ereport(ERROR,
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(errcode_for_file_access(),
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errmsg("could not stat \"%s\": %m", filename)));
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dirsize += fst.st_size;
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}
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FreeDir(dirdesc);
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return dirsize;
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}
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static int64
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calculate_database_size(Oid dbOid)
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{
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int64 totalsize=0;
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DIR *dirdesc;
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struct dirent *direntry;
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char pathname[MAXPGPATH];
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snprintf(pathname, MAXPGPATH, "%s/global/%u", DataDir, (unsigned)dbOid);
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totalsize += db_dir_size(pathname);
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snprintf(pathname, MAXPGPATH, "%s/base/%u", DataDir, (unsigned)dbOid);
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totalsize += db_dir_size(pathname);
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snprintf(pathname, MAXPGPATH, "%s/pg_tblspc", DataDir);
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dirdesc = AllocateDir(pathname);
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if (!dirdesc)
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ereport(ERROR,
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(errcode_for_file_access(),
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errmsg("could not open tablespace directory: %m")));
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while ((direntry = readdir(dirdesc)) != 0)
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{
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if (!strcmp(direntry->d_name, ".") || !strcmp(direntry->d_name, ".."))
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continue;
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snprintf(pathname, MAXPGPATH, "%s/pg_tblspc/%s/%u", DataDir, direntry->d_name, (unsigned)dbOid);
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totalsize += db_dir_size(pathname);
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}
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FreeDir(dirdesc);
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if (!totalsize)
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ereport(ERROR,
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(ERRCODE_UNDEFINED_DATABASE,
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errmsg("Database OID %u unknown.", (unsigned)dbOid)));
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return totalsize;
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}
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/*
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* SQL function: database_size(name) returns bigint
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* calculate total size of tablespace
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*/
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PG_FUNCTION_INFO_V1(database_size);
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Datum database_size(PG_FUNCTION_ARGS);
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Datum
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database_size(PG_FUNCTION_ARGS)
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pg_tablespace_size(PG_FUNCTION_ARGS)
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{
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Name dbname = PG_GETARG_NAME(0);
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Oid tblspcOid = PG_GETARG_OID(0);
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Oid dbid;
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int64 totalsize;
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char tblspcPath[MAXPGPATH];
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char pathname[MAXPGPATH];
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int64 totalsize=0;
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DIR *dirdesc;
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struct dirent *direntry;
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#ifdef SYMLINK
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Relation dbrel;
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HeapScanDesc scan;
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HeapTuple tuple;
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#endif
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if (tblspcOid == DEFAULTTABLESPACE_OID)
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snprintf(tblspcPath, MAXPGPATH, "%s/base", DataDir);
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else if (tblspcOid == GLOBALTABLESPACE_OID)
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snprintf(tblspcPath, MAXPGPATH, "%s/global", DataDir);
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else
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snprintf(tblspcPath, MAXPGPATH, "%s/pg_tblspc/%u", DataDir, (unsigned)tblspcOid);
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dbid = get_database_oid(NameStr(*dbname));
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if (!OidIsValid(dbid))
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dirdesc = AllocateDir(tblspcPath);
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if (!dirdesc)
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ereport(ERROR,
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(errcode(ERRCODE_UNDEFINED_DATABASE),
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errmsg("database \"%s\" does not exist", NameStr(*dbname))));
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(errcode_for_file_access(),
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errmsg("No such tablespace OID: %u: %m", (unsigned)tblspcOid)));
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#ifdef SYMLINK
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dbrel = heap_openr(TableSpaceRelationName, AccessShareLock);
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scan = heap_beginscan(dbrel, SnapshotNow, 0, (ScanKey) NULL);
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totalsize = 0;
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while ((tuple = heap_getnext(scan, ForwardScanDirection)))
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while ((direntry = readdir(dirdesc)) != 0)
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{
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Oid spcid = HeapTupleGetOid(tuple);
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struct stat fst;
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if (spcid != GLOBALTABLESPACE_OID)
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totalsize += get_tablespace_size(dbid, spcid, true);
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if (!strcmp(direntry->d_name, ".") || !strcmp(direntry->d_name, ".."))
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continue;
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snprintf(pathname, MAXPGPATH, "%s/%s", tblspcPath, direntry->d_name);
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if (stat(pathname, &fst) < 0)
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ereport(ERROR,
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(errcode_for_file_access(),
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errmsg("could not stat \"%s\": %m", pathname)));
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totalsize += fst.st_size;
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if (fst.st_mode & S_IFDIR)
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totalsize += db_dir_size(pathname);
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}
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heap_endscan(scan);
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heap_close(dbrel, AccessShareLock);
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#else
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/* Same as always */
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totalsize = get_tablespace_size(dbid, DEFAULTTABLESPACE_OID, false);
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#endif
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/*
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* We need to keep in mind that we may not be called from the database
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* whose size we're reporting so, we need to look in every tablespace
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* to see if our database has data in there
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*/
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FreeDir(dirdesc);
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PG_RETURN_INT64(totalsize);
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}
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static int64
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get_tablespace_size(Oid dbid, Oid spcid, bool baddirOK)
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/*
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* calculate size of databases in all tablespaces
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*/
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Datum
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pg_database_size(PG_FUNCTION_ARGS)
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{
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char *dbpath;
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DIR *dirdesc;
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struct dirent *direntry;
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int64 totalsize;
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Oid dbOid = PG_GETARG_OID(0);
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dbpath = GetDatabasePath(dbid, spcid);
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PG_RETURN_INT64(calculate_database_size(dbOid));
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}
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dirdesc = AllocateDir(dbpath);
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if (!dirdesc)
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Datum
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database_size(PG_FUNCTION_ARGS)
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{
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Name dbName = PG_GETARG_NAME(0);
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Oid dbOid = get_database_oid(NameStr(*dbName));
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if (!OidIsValid(dbOid))
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ereport(ERROR,
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(errcode(ERRCODE_UNDEFINED_DATABASE),
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errmsg("database \"%s\" does not exist", NameStr(*dbName))));
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PG_RETURN_INT64(calculate_database_size(dbOid));
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}
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static int64
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calculate_relation_size(Oid tblspcOid, Oid relnodeOid)
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{
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int64 totalsize=0;
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unsigned int segcount=0;
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char dirpath[MAXPGPATH];
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char pathname[MAXPGPATH];
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if (tblspcOid == 0 || tblspcOid == DEFAULTTABLESPACE_OID)
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snprintf(dirpath, MAXPGPATH, "%s/base/%u", DataDir, (unsigned)MyDatabaseId);
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else if (tblspcOid == GLOBALTABLESPACE_OID)
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snprintf(dirpath, MAXPGPATH, "%s/global", DataDir);
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else
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snprintf(dirpath, MAXPGPATH, "%s/pg_tblspc/%u/%u", DataDir, (unsigned)tblspcOid, (unsigned)MyDatabaseId);
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for (segcount = 0 ;; segcount++)
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{
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if (baddirOK)
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return 0;
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struct stat fst;
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if (segcount == 0)
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snprintf(pathname, MAXPGPATH, "%s/%u", dirpath, (unsigned) relnodeOid);
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else
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ereport(ERROR,
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(errcode_for_file_access(),
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errmsg("could not open directory \"%s\": %m", dbpath)));
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}
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totalsize = 0;
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for (;;)
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{
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char *fullname;
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struct stat statbuf;
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snprintf(pathname, MAXPGPATH, "%s/%u.%u", dirpath, (unsigned) relnodeOid, segcount);
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errno = 0;
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direntry = readdir(dirdesc);
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if (!direntry)
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if (stat(pathname, &fst) < 0)
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{
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if (errno)
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if (errno == ENOENT)
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break;
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else
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ereport(ERROR,
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(errcode_for_file_access(),
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errmsg("error reading directory: %m")));
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else
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break;
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errmsg("could not stat \"%s\": %m", pathname)));
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}
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fullname = psnprintf(strlen(dbpath) + 1 + strlen(direntry->d_name) + 1,
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"%s/%s", dbpath, direntry->d_name);
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if (stat(fullname, &statbuf) == -1)
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ereport(ERROR,
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(errcode_for_file_access(),
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errmsg("could not stat \"%s\": %m", fullname)));
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totalsize += statbuf.st_size;
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pfree(fullname);
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totalsize += fst.st_size;
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}
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FreeDir(dirdesc);
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return (totalsize);
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return totalsize;
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}
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/*
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* SQL function: relation_size(text) returns bigint
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* calculate size of relation
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*/
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Datum
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pg_relation_size(PG_FUNCTION_ARGS)
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{
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Oid relOid=PG_GETARG_OID(0);
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PG_FUNCTION_INFO_V1(relation_size);
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HeapTuple tuple;
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Form_pg_class pg_class;
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Oid relnodeOid;
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Oid tblspcOid;
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char relkind;
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tuple = SearchSysCache(RELOID, ObjectIdGetDatum(relOid), 0, 0, 0);
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if (!HeapTupleIsValid(tuple))
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ereport(ERROR,
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(ERRCODE_UNDEFINED_TABLE,
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errmsg("Relation OID %u does not exist", relOid)));
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pg_class = (Form_pg_class) GETSTRUCT(tuple);
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relnodeOid = pg_class->relfilenode;
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tblspcOid = pg_class->reltablespace;
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relkind = pg_class->relkind;
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ReleaseSysCache(tuple);
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switch(relkind)
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{
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case RELKIND_INDEX:
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case RELKIND_RELATION:
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case RELKIND_TOASTVALUE:
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break;
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default:
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ereport(ERROR,
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(ERRCODE_WRONG_OBJECT_TYPE,
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errmsg("Relation kind %d not supported", relkind)));
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}
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PG_RETURN_INT64(calculate_relation_size(tblspcOid, relnodeOid));
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}
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Datum relation_size(PG_FUNCTION_ARGS);
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Datum
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relation_size(PG_FUNCTION_ARGS)
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@ -160,43 +288,58 @@ relation_size(PG_FUNCTION_ARGS)
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RangeVar *relrv;
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Relation relation;
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Oid relnode;
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int64 totalsize;
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unsigned int segcount;
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Oid relnodeOid;
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Oid tblspcOid;
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relrv = makeRangeVarFromNameList(textToQualifiedNameList(relname,
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"relation_size"));
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relation = heap_openrv(relrv, AccessShareLock);
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relnode = relation->rd_rel->relfilenode;
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totalsize = 0;
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segcount = 0;
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for (;;)
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{
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char *fullname;
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struct stat statbuf;
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if (segcount == 0)
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fullname = psnprintf(25, "%u", (unsigned) relnode);
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else
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fullname = psnprintf(50, "%u.%u", (unsigned) relnode, segcount);
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if (stat(fullname, &statbuf) == -1)
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{
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if (errno == ENOENT)
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break;
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else
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ereport(ERROR,
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(errcode_for_file_access(),
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errmsg("could not stat \"%s\": %m", fullname)));
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}
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totalsize += statbuf.st_size;
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pfree(fullname);
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segcount++;
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}
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tblspcOid = relation->rd_rel->reltablespace;
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relnodeOid = relation->rd_rel->relfilenode;
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heap_close(relation, AccessShareLock);
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PG_RETURN_INT64(totalsize);
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PG_RETURN_INT64(calculate_relation_size(tblspcOid, relnodeOid));
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}
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/*
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* formatting with size units
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*/
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Datum
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pg_size_pretty(PG_FUNCTION_ARGS)
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{
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int64 size=PG_GETARG_INT64(0);
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char *result=palloc(50+VARHDRSZ);
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int64 limit = 10*1024;
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int64 mult=1;
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if (size < limit*mult)
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snprintf(VARDATA(result), 50, INT64_FORMAT" bytes", size);
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else
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{
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mult *= 1024;
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if (size < limit*mult)
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snprintf(VARDATA(result), 50, INT64_FORMAT " kB", (size+mult/2) / mult);
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else
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{
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mult *= 1024;
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if (size < limit*mult)
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snprintf(VARDATA(result), 50, INT64_FORMAT " MB", (size+mult/2) / mult);
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else
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{
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mult *= 1024;
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if (size < limit*mult)
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snprintf(VARDATA(result), 50, INT64_FORMAT " GB", (size+mult/2) / mult);
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else
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{
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mult *= 1024;
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snprintf(VARDATA(result), 50, INT64_FORMAT " TB", (size+mult/2) / mult);
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}
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}
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}
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}
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VARATT_SIZEP(result) = strlen(VARDATA(result)) + VARHDRSZ;
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PG_RETURN_TEXT_P(result);
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}
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|
|
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|
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@ -5,3 +5,19 @@ CREATE FUNCTION database_size (name) RETURNS bigint
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CREATE FUNCTION relation_size (text) RETURNS bigint
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AS 'MODULE_PATHNAME', 'relation_size'
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LANGUAGE C WITH (isstrict);
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CREATE FUNCTION pg_tablespace_size(oid) RETURNS bigint
|
||||
AS 'MODULE_PATHNAME', 'pg_tablespace_size'
|
||||
LANGUAGE C STABLE STRICT;
|
||||
|
||||
CREATE FUNCTION pg_database_size(oid) RETURNS bigint
|
||||
AS 'MODULE_PATHNAME', 'pg_database_size'
|
||||
LANGUAGE C STABLE STRICT;
|
||||
|
||||
CREATE FUNCTION pg_relation_size(oid) RETURNS bigint
|
||||
AS 'MODULE_PATHNAME', 'pg_relation_size'
|
||||
LANGUAGE C STABLE STRICT;
|
||||
|
||||
CREATE FUNCTION pg_size_pretty(bigint) RETURNS text
|
||||
AS 'MODULE_PATHNAME', 'pg_size_pretty'
|
||||
LANGUAGE C STABLE STRICT;
|
||||
|
|
|
|||
Loading…
Reference in New Issue