From 358a897fa1d7ff49c350f2cb7a0372c0f67dfb88 Mon Sep 17 00:00:00 2001 From: Bruce Momjian Date: Fri, 29 Jul 2005 14:47:04 +0000 Subject: Move dbsize functions into the backend. New functions: pg_tablespace_size pg_database_size pg_relation_size pg_complete_relation_size pg_size_pretty Remove /contrib/dbsize. Dave Page --- src/backend/utils/adt/dbsize.c | 461 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 461 insertions(+) create mode 100644 src/backend/utils/adt/dbsize.c (limited to 'src/backend/utils/adt/dbsize.c') diff --git a/src/backend/utils/adt/dbsize.c b/src/backend/utils/adt/dbsize.c new file mode 100644 index 00000000000..158d2cf4026 --- /dev/null +++ b/src/backend/utils/adt/dbsize.c @@ -0,0 +1,461 @@ +/* + * dbsize.c + * object size functions + * + * Copyright (c) 2002-2005, PostgreSQL Global Development Group + * + * IDENTIFICATION + * $PostgreSQL: pgsql/src/backend/utils/adt/dbsize.c,v 1.1 2005/07/29 14:46:57 momjian Exp $ + * + */ + +#include "postgres.h" + +#include +#include + +#include "access/heapam.h" +#include "catalog/namespace.h" +#include "catalog/pg_tablespace.h" +#include "commands/dbcommands.h" +#include "commands/tablespace.h" +#include "miscadmin.h" +#include "storage/fd.h" +#include "utils/builtins.h" +#include "utils/syscache.h" +#include "utils/relcache.h" + + +/* Return physical size of directory contents, or 0 if dir doesn't exist */ +static int64 +db_dir_size(const char *path) +{ + int64 dirsize = 0; + struct dirent *direntry; + DIR *dirdesc; + char filename[MAXPGPATH]; + + dirdesc = AllocateDir(path); + + if (!dirdesc) + return 0; + + while ((direntry = readdir(dirdesc)) != NULL) + { + struct stat fst; + + if (strcmp(direntry->d_name, ".") == 0 || + strcmp(direntry->d_name, "..") == 0) + continue; + + snprintf(filename, MAXPGPATH, "%s/%s", path, direntry->d_name); + + if (stat(filename, &fst) < 0) + ereport(ERROR, + (errcode_for_file_access(), + errmsg("could not stat \"%s\": %m", filename))); + + dirsize += fst.st_size; + } + + FreeDir(dirdesc); + return dirsize; +} + +/* + * calculate size of database in all tablespaces + */ +static int64 +calculate_database_size(Oid dbOid) +{ + int64 totalsize = 0; + DIR *dirdesc; + struct dirent *direntry; + char pathname[MAXPGPATH]; + + /* Shared storage in pg_global is not counted */ + + /* Include pg_default storage */ + snprintf(pathname, MAXPGPATH, "%s/base/%u", DataDir, dbOid); + totalsize += db_dir_size(pathname); + + /* Scan the non-default tablespaces */ + snprintf(pathname, MAXPGPATH, "%s/pg_tblspc", DataDir); + dirdesc = AllocateDir(pathname); + if (!dirdesc) + ereport(ERROR, + (errcode_for_file_access(), + errmsg("could not open tablespace directory \"%s\": %m", + pathname))); + + while ((direntry = readdir(dirdesc)) != NULL) + { + if (strcmp(direntry->d_name, ".") == 0 || + strcmp(direntry->d_name, "..") == 0) + continue; + + snprintf(pathname, MAXPGPATH, "%s/pg_tblspc/%s/%u", + DataDir, direntry->d_name, dbOid); + totalsize += db_dir_size(pathname); + } + + FreeDir(dirdesc); + + /* Complain if we found no trace of the DB at all */ + if (!totalsize) + ereport(ERROR, + (ERRCODE_UNDEFINED_DATABASE, + errmsg("database with OID %u does not exist", dbOid))); + + return totalsize; +} + +Datum +pg_database_size_oid(PG_FUNCTION_ARGS) +{ + Oid dbOid = PG_GETARG_OID(0); + + PG_RETURN_INT64(calculate_database_size(dbOid)); +} + +Datum +pg_database_size_name(PG_FUNCTION_ARGS) +{ + Name dbName = PG_GETARG_NAME(0); + Oid dbOid = get_database_oid(NameStr(*dbName)); + + if (!OidIsValid(dbOid)) + ereport(ERROR, + (errcode(ERRCODE_UNDEFINED_DATABASE), + errmsg("database \"%s\" does not exist", + NameStr(*dbName)))); + + PG_RETURN_INT64(calculate_database_size(dbOid)); +} + + +/* + * calculate total size of tablespace + */ +static int64 +calculate_tablespace_size(Oid tblspcOid) +{ + char tblspcPath[MAXPGPATH]; + char pathname[MAXPGPATH]; + int64 totalsize=0; + DIR *dirdesc; + struct dirent *direntry; + + if (tblspcOid == DEFAULTTABLESPACE_OID) + snprintf(tblspcPath, MAXPGPATH, "%s/base", DataDir); + else if (tblspcOid == GLOBALTABLESPACE_OID) + snprintf(tblspcPath, MAXPGPATH, "%s/global", DataDir); + else + snprintf(tblspcPath, MAXPGPATH, "%s/pg_tblspc/%u", DataDir, tblspcOid); + + dirdesc = AllocateDir(tblspcPath); + + if (!dirdesc) + ereport(ERROR, + (errcode_for_file_access(), + errmsg("could not open tablespace directory \"%s\": %m", + tblspcPath))); + + while ((direntry = readdir(dirdesc)) != NULL) + { + struct stat fst; + + if (strcmp(direntry->d_name, ".") == 0 || + strcmp(direntry->d_name, "..") == 0) + continue; + + snprintf(pathname, MAXPGPATH, "%s/%s", tblspcPath, direntry->d_name); + + if (stat(pathname, &fst) < 0) + ereport(ERROR, + (errcode_for_file_access(), + errmsg("could not stat \"%s\": %m", pathname))); + + if (fst.st_mode & S_IFDIR) + totalsize += db_dir_size(pathname); + + totalsize += fst.st_size; + } + + FreeDir(dirdesc); + + return totalsize; +} + +Datum +pg_tablespace_size_oid(PG_FUNCTION_ARGS) +{ + Oid tblspcOid = PG_GETARG_OID(0); + + PG_RETURN_INT64(calculate_tablespace_size(tblspcOid)); +} + +Datum +pg_tablespace_size_name(PG_FUNCTION_ARGS) +{ + Name tblspcName = PG_GETARG_NAME(0); + Oid tblspcOid = get_tablespace_oid(NameStr(*tblspcName)); + + if (!OidIsValid(tblspcOid)) + ereport(ERROR, + (errcode(ERRCODE_UNDEFINED_OBJECT), + errmsg("tablespace \"%s\" does not exist", + NameStr(*tblspcName)))); + + PG_RETURN_INT64(calculate_tablespace_size(tblspcOid)); +} + + +/* + * calculate size of a relation + */ +static int64 +calculate_relation_size(Oid tblspcOid, Oid relnodeOid) +{ + int64 totalsize=0; + unsigned int segcount=0; + char dirpath[MAXPGPATH]; + char pathname[MAXPGPATH]; + + if (!tblspcOid) + tblspcOid = MyDatabaseTableSpace; + + if (tblspcOid == DEFAULTTABLESPACE_OID) + snprintf(dirpath, MAXPGPATH, "%s/base/%u", DataDir, MyDatabaseId); + else if (tblspcOid == GLOBALTABLESPACE_OID) + snprintf(dirpath, MAXPGPATH, "%s/global", DataDir); + else + snprintf(dirpath, MAXPGPATH, "%s/pg_tblspc/%u/%u", + DataDir, tblspcOid, MyDatabaseId); + + for (segcount = 0 ;; segcount++) + { + struct stat fst; + + if (segcount == 0) + snprintf(pathname, MAXPGPATH, "%s/%u", + dirpath, relnodeOid); + else + snprintf(pathname, MAXPGPATH, "%s/%u.%u", + dirpath, relnodeOid, segcount); + + if (stat(pathname, &fst) < 0) + { + if (errno == ENOENT) + break; + else + ereport(ERROR, + (errcode_for_file_access(), + errmsg("could not stat \"%s\": %m", pathname))); + } + totalsize += fst.st_size; + } + + return totalsize; +} + +Datum +pg_relation_size_oid(PG_FUNCTION_ARGS) +{ + Oid relOid=PG_GETARG_OID(0); + HeapTuple tuple; + Form_pg_class pg_class; + Oid relnodeOid; + Oid tblspcOid; + + tuple = SearchSysCache(RELOID, + ObjectIdGetDatum(relOid), + 0, 0, 0); + if (!HeapTupleIsValid(tuple)) + ereport(ERROR, + (ERRCODE_UNDEFINED_TABLE, + errmsg("relation with OID %u does not exist", relOid))); + + pg_class = (Form_pg_class) GETSTRUCT(tuple); + relnodeOid = pg_class->relfilenode; + tblspcOid = pg_class->reltablespace; + + ReleaseSysCache(tuple); + + PG_RETURN_INT64(calculate_relation_size(tblspcOid, relnodeOid)); +} + +Datum +pg_relation_size_name(PG_FUNCTION_ARGS) +{ + text *relname = PG_GETARG_TEXT_P(0); + RangeVar *relrv; + Relation relation; + Oid relnodeOid; + Oid tblspcOid; + + relrv = makeRangeVarFromNameList(textToQualifiedNameList(relname)); + relation = relation_openrv(relrv, AccessShareLock); + + tblspcOid = relation->rd_rel->reltablespace; + relnodeOid = relation->rd_rel->relfilenode; + + relation_close(relation, AccessShareLock); + + PG_RETURN_INT64(calculate_relation_size(tblspcOid, relnodeOid)); +} + + +/* + * Compute on-disk size of files for 'relation' according to the stat function, + * optionally including heap data, index data, and/or toast data. + */ +static int64 +calculate_complete_relation_size(Oid tblspcOid, Oid relnodeOid) +{ + Relation heapRelation; + Relation idxRelation; + Relation toastRelation; + Oid idxOid; + Oid idxTblspcOid; + Oid toastOid; + Oid toastTblspcOid; + bool hasIndices; + int64 size = 0; + List *indexoidlist; + ListCell *idx; + + heapRelation = relation_open(relnodeOid, AccessShareLock); + toastOid = heapRelation->rd_rel->reltoastrelid; + hasIndices = heapRelation->rd_rel->relhasindex; + + /* Get the heap size */ + size += calculate_relation_size(tblspcOid, relnodeOid); + + /* Get Index size */ + if ( hasIndices ) { + /* recursively include any dependent indexes ... */ + indexoidlist = RelationGetIndexList(heapRelation); + + foreach(idx, indexoidlist) { + idxOid = lfirst_oid(idx); + idxRelation = relation_open(idxOid, AccessShareLock); + idxTblspcOid = idxRelation->rd_rel->reltablespace; + size += calculate_relation_size(idxTblspcOid, idxOid); + relation_close(idxRelation, AccessShareLock); + } + list_free(indexoidlist); + } + + /* Close heapReleation now we no longer need it */ + relation_close(heapRelation, AccessShareLock); + + /* Get toast table size */ + if ( toastOid != 0 ) { + + /* recursively include any toast relations ... */ + toastRelation = relation_open(toastOid, AccessShareLock); + toastTblspcOid = toastRelation->rd_rel->reltablespace; + size += calculate_relation_size(toastTblspcOid, toastOid); + relation_close(toastRelation, AccessShareLock); + } + + return size; +} + +/* + * Compute on-disk size of files for 'relation' including + * heap data, index data, and toasted data. + */ +Datum +pg_complete_relation_size_oid(PG_FUNCTION_ARGS) +{ + Oid relOid=PG_GETARG_OID(0); + HeapTuple tuple; + Form_pg_class pg_class; + Oid relnodeOid; + Oid tblspcOid; + + tuple = SearchSysCache(RELOID, + ObjectIdGetDatum(relOid), + 0, 0, 0); + if (!HeapTupleIsValid(tuple)) + ereport(ERROR, + (ERRCODE_UNDEFINED_TABLE, + errmsg("relation with OID %u does not exist", relOid))); + + pg_class = (Form_pg_class) GETSTRUCT(tuple); + relnodeOid = pg_class->relfilenode; + tblspcOid = pg_class->reltablespace; + + ReleaseSysCache(tuple); + + PG_RETURN_INT64(calculate_complete_relation_size(tblspcOid, relnodeOid)); +} + +Datum +pg_complete_relation_size_name(PG_FUNCTION_ARGS) +{ + text *relname = PG_GETARG_TEXT_P(0); + RangeVar *relrv; + Relation relation; + Oid relnodeOid; + Oid tblspcOid; + + relrv = makeRangeVarFromNameList(textToQualifiedNameList(relname)); + relation = relation_openrv(relrv, AccessShareLock); + + tblspcOid = relation->rd_rel->reltablespace; + relnodeOid = relation->rd_rel->relfilenode; + + relation_close(relation, AccessShareLock); + + PG_RETURN_INT64(calculate_complete_relation_size(tblspcOid, relnodeOid)); +} + +/* + * formatting with size units + */ +Datum +pg_size_pretty(PG_FUNCTION_ARGS) +{ + int64 size=PG_GETARG_INT64(0); + char *result=palloc(50+VARHDRSZ); + int64 limit = 10*1024; + int64 mult=1; + + if (size < limit*mult) + snprintf(VARDATA(result), 50, INT64_FORMAT" bytes", + size); + else + { + mult *= 1024; + if (size < limit*mult) + snprintf(VARDATA(result), 50, INT64_FORMAT " kB", + (size+mult/2) / mult); + else + { + mult *= 1024; + if (size < limit*mult) + snprintf(VARDATA(result), 50, INT64_FORMAT " MB", + (size+mult/2) / mult); + else + { + mult *= 1024; + if (size < limit*mult) + snprintf(VARDATA(result), 50, INT64_FORMAT " GB", + (size+mult/2) / mult); + else + { + mult *= 1024; + snprintf(VARDATA(result), 50, INT64_FORMAT " TB", + (size+mult/2) / mult); + } + } + } + } + + VARATT_SIZEP(result) = strlen(VARDATA(result)) + VARHDRSZ; + + PG_RETURN_TEXT_P(result); +} -- cgit v1.2.3