dbsize backend integration - Mailing list pgsql-patches
| From | Andreas Pflug |
|---|---|
| Subject | dbsize backend integration |
| Date | |
| Msg-id | 429E055B.5020505@pse-consulting.de Whole thread Raw |
| Responses |
Re: dbsize backend integration
Re: dbsize backend integration |
| List | pgsql-patches |
As a start for a bunch of instrumentation functions that should be
included in the backend as discussed previously, here are the dbsize
functions. The dbsize.c file should go to the usual place,
src/backend/utils/adt.
Regards,
Andreas
? GNUmakefile
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? doc/src/sgml/sql-unlisten.html
? doc/src/sgml/sql-update.html
? doc/src/sgml/sql-vacuum.html
? doc/src/sgml/sql.html
? doc/src/sgml/ssh-tunnels.html
? doc/src/sgml/ssl-tcp.html
? doc/src/sgml/storage-page-layout.html
? doc/src/sgml/storage-toast.html
? doc/src/sgml/storage.html
? doc/src/sgml/supported-platforms.html
? doc/src/sgml/transaction-iso.html
? doc/src/sgml/trigger-datachanges.html
? doc/src/sgml/trigger-example.html
? doc/src/sgml/trigger-interface.html
? doc/src/sgml/triggers.html
? doc/src/sgml/tutorial-accessdb.html
? doc/src/sgml/tutorial-advanced.html
? doc/src/sgml/tutorial-agg.html
? doc/src/sgml/tutorial-arch.html
? doc/src/sgml/tutorial-concepts.html
? doc/src/sgml/tutorial-conclusion.html
? doc/src/sgml/tutorial-createdb.html
? doc/src/sgml/tutorial-delete.html
? doc/src/sgml/tutorial-fk.html
? doc/src/sgml/tutorial-inheritance.html
? doc/src/sgml/tutorial-join.html
? doc/src/sgml/tutorial-populate.html
? doc/src/sgml/tutorial-select.html
? doc/src/sgml/tutorial-sql.html
? doc/src/sgml/tutorial-start.html
? doc/src/sgml/tutorial-table.html
? doc/src/sgml/tutorial-transactions.html
? doc/src/sgml/tutorial-update.html
? doc/src/sgml/tutorial-views.html
? doc/src/sgml/tutorial.html
? doc/src/sgml/typeconv-func.html
? doc/src/sgml/typeconv-oper.html
? doc/src/sgml/typeconv-query.html
? doc/src/sgml/typeconv-union-case.html
? doc/src/sgml/typeconv.html
? doc/src/sgml/unsupported-features-sql-standard.html
? doc/src/sgml/user-attributes.html
? doc/src/sgml/user-manag.html
? doc/src/sgml/version.sgml
? doc/src/sgml/view-pg-indexes.html
? doc/src/sgml/view-pg-locks.html
? doc/src/sgml/view-pg-rules.html
? doc/src/sgml/view-pg-settings.html
? doc/src/sgml/view-pg-stats.html
? doc/src/sgml/view-pg-tables.html
? doc/src/sgml/view-pg-user.html
? doc/src/sgml/view-pg-views.html
? doc/src/sgml/views-overview.html
? doc/src/sgml/wal-configuration.html
? doc/src/sgml/wal-internals.html
? doc/src/sgml/wal.html
? doc/src/sgml/xaggr.html
? doc/src/sgml/xfunc-c.html
? doc/src/sgml/xfunc-internal.html
? doc/src/sgml/xfunc-overload.html
? doc/src/sgml/xfunc-pl.html
? doc/src/sgml/xfunc-sql.html
? doc/src/sgml/xfunc-volatility.html
? doc/src/sgml/xfunc.html
? doc/src/sgml/xindex.html
? doc/src/sgml/xoper-optimization.html
? doc/src/sgml/xoper.html
? doc/src/sgml/xplang.html
? doc/src/sgml/xtypes.html
? src/Makefile.global
? src/backend/postgres
? src/backend/catalog/postgres.bki
? src/backend/catalog/postgres.description
? src/backend/utils/adt/dbsize.c
? src/backend/utils/adt/ruleutils.diff
? src/backend/utils/mb/conversion_procs/conversion_create.sql
? src/backend/utils/mb/conversion_procs/ascii_and_mic/libascii_and_mic.so.0.0
? src/backend/utils/mb/conversion_procs/cyrillic_and_mic/libcyrillic_and_mic.so.0.0
? src/backend/utils/mb/conversion_procs/euc_cn_and_mic/libeuc_cn_and_mic.so.0.0
? src/backend/utils/mb/conversion_procs/euc_jp_and_sjis/libeuc_jp_and_sjis.so.0.0
? src/backend/utils/mb/conversion_procs/euc_kr_and_mic/libeuc_kr_and_mic.so.0.0
? src/backend/utils/mb/conversion_procs/euc_tw_and_big5/libeuc_tw_and_big5.so.0.0
? src/backend/utils/mb/conversion_procs/latin2_and_win1250/liblatin2_and_win1250.so.0.0
? src/backend/utils/mb/conversion_procs/latin_and_mic/liblatin_and_mic.so.0.0
? src/backend/utils/mb/conversion_procs/utf8_and_ascii/libutf8_and_ascii.so.0.0
? src/backend/utils/mb/conversion_procs/utf8_and_big5/libutf8_and_big5.so.0.0
? src/backend/utils/mb/conversion_procs/utf8_and_cyrillic/libutf8_and_cyrillic.so.0.0
? src/backend/utils/mb/conversion_procs/utf8_and_euc_cn/libutf8_and_euc_cn.so.0.0
? src/backend/utils/mb/conversion_procs/utf8_and_euc_jp/libutf8_and_euc_jp.so.0.0
? src/backend/utils/mb/conversion_procs/utf8_and_euc_kr/libutf8_and_euc_kr.so.0.0
? src/backend/utils/mb/conversion_procs/utf8_and_euc_tw/libutf8_and_euc_tw.so.0.0
? src/backend/utils/mb/conversion_procs/utf8_and_gb18030/libutf8_and_gb18030.so.0.0
? src/backend/utils/mb/conversion_procs/utf8_and_gbk/libutf8_and_gbk.so.0.0
? src/backend/utils/mb/conversion_procs/utf8_and_iso8859/libutf8_and_iso8859.so.0.0
? src/backend/utils/mb/conversion_procs/utf8_and_iso8859_1/libutf8_and_iso8859_1.so.0.0
? src/backend/utils/mb/conversion_procs/utf8_and_johab/libutf8_and_johab.so.0.0
? src/backend/utils/mb/conversion_procs/utf8_and_sjis/libutf8_and_sjis.so.0.0
? src/backend/utils/mb/conversion_procs/utf8_and_tcvn/libutf8_and_tcvn.so.0.0
? src/backend/utils/mb/conversion_procs/utf8_and_uhc/libutf8_and_uhc.so.0.0
? src/backend/utils/mb/conversion_procs/utf8_and_win1250/libutf8_and_win1250.so.0.0
? src/backend/utils/mb/conversion_procs/utf8_and_win1252/libutf8_and_win1252.so.0.0
? src/backend/utils/mb/conversion_procs/utf8_and_win1256/libutf8_and_win1256.so.0.0
? src/backend/utils/mb/conversion_procs/utf8_and_win1258/libutf8_and_win1258.so.0.0
? src/backend/utils/mb/conversion_procs/utf8_and_win874/libutf8_and_win874.so.0.0
? src/bin/initdb/initdb
? src/bin/ipcclean/ipcclean
? src/bin/pg_config/pg_config
? src/bin/pg_controldata/pg_controldata
? src/bin/pg_ctl/pg_ctl
? src/bin/pg_dump/pg_dump
? src/bin/pg_dump/pg_dumpall
? src/bin/pg_dump/pg_restore
? src/bin/pg_resetxlog/pg_resetxlog
? src/bin/psql/psql
? src/bin/scripts/clusterdb
? src/bin/scripts/createdb
? src/bin/scripts/createlang
? src/bin/scripts/createuser
? src/bin/scripts/dropdb
? src/bin/scripts/droplang
? src/bin/scripts/dropuser
? src/bin/scripts/vacuumdb
? src/include/pg_config.h
? src/include/stamp-h
? src/interfaces/ecpg/compatlib/libecpg_compat.so.1.1
? src/interfaces/ecpg/compatlib/libecpg_compat.so.2.1
? src/interfaces/ecpg/ecpglib/libecpg.so.4.2
? src/interfaces/ecpg/ecpglib/libecpg.so.5.1
? src/interfaces/ecpg/pgtypeslib/libpgtypes.so.1.2
? src/interfaces/ecpg/pgtypeslib/libpgtypes.so.2.1
? src/interfaces/ecpg/preproc/ecpg
? src/interfaces/libpq/libpq.so.3.2
? src/interfaces/libpq/libpq.so.4.1
? src/pl/plpgsql/src/libplpgsql.so.1.0
? src/port/pg_config_paths.h
? src/timezone/zic
Index: doc/src/sgml/func.sgml
===================================================================
RCS file: /projects/cvsroot/pgsql/doc/src/sgml/func.sgml,v
retrieving revision 1.250
diff -u -r1.250 func.sgml
--- doc/src/sgml/func.sgml 23 May 2005 01:50:01 -0000 1.250
+++ doc/src/sgml/func.sgml 1 Jun 2005 18:50:16 -0000
@@ -8970,6 +8970,83 @@
For details about proper usage of these functions, see
<xref linkend="backup-online">.
</para>
+
+ <indexterm zone="functions-admin">
+ <primary>pg_tablespace_size</primary>
+ </indexterm>
+ <indexterm zone="functions-admin">
+ <primary>pg_database_size</primary>
+ </indexterm>
+ <indexterm zone="functions-admin">
+ <primary>pg_relation_size</primary>
+ </indexterm>
+ <indexterm zone="functions-admin">
+ <primary>pg_size_pretty</primary>
+ </indexterm>
+
+ <para>
+ The functions shown in <xref
+ linkend="functions-admin-dbsize"> calculate the actual disk space
+ usage of database objects.
+ </para>
+
+ <table id="functions-admin-dbsize">
+ <title>Database Object Size Functions</title>
+ <tgroup cols="3">
+ <thead>
+ <row><entry>Name</entry> <entry>Return Type</entry> <entry>Description</entry>
+ </row>
+ </thead>
+
+ <tbody>
+ <row>
+ <entry>
+ <literal><function>pg_tablespace_size</function>(<parameter>tablespace_oid</parameter>)</literal>
+ </entry>
+ <entry><type>int8</type></entry>
+ <entry>Calculates total disk space of a tablespace</entry>
+ </row>
+ <row>
+ <entry>
+ <literal><function>pg_database_size</function>(<parameter>database_oid</parameter>)</literal>
+ </entry>
+ <entry><type>int8</type></entry>
+ <entry>Calculates total disk space of a database</entry>
+ </row>
+ <row>
+ <entry>
+ <literal><function>pg_relation_size</function>(<parameter>relation_oid</parameter>)</literal>
+ </entry>
+ <entry><type>int8</type></entry>
+ <entry>Calculates total disk space of a relation</entry>
+ </row>
+ <row>
+ <entry>
+ <literal><function>pg_size_pretty</function>(<parameter>size_int8</parameter>)</literal>
+ </entry>
+ <entry><type>text</type></entry>
+ <entry>Formats the size in a human readable format with size units </entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <para>
+ <function>pg_tablespace_size</>, <function>pg_tablespace_size</>
+ and <function>pg_relation_size</> accept an oid, and calculate
+ the disk space usage of the object.
+ </para>
+ <para>
+ <function>pg_relation_size</> accepts oids of standard tables, indexes and
+ toast tables. To calculate the disk space usage of a table
+ including all its indexes and toast tables, these components need
+ to be summed up.
+ </para>
+ <para>
+ <function>pg_size_pretty</> can be used to format the size of the
+ database objects in a human readable way, using kB, MB, GB or TB as appropriate.
+ </para>
+
</sect1>
</chapter>
Index: src/backend/utils/adt/Makefile
===================================================================
RCS file: /projects/cvsroot/pgsql/src/backend/utils/adt/Makefile,v
retrieving revision 1.57
diff -u -r1.57 Makefile
--- src/backend/utils/adt/Makefile 1 Apr 2004 21:28:45 -0000 1.57
+++ src/backend/utils/adt/Makefile 1 Jun 2005 18:50:20 -0000
@@ -24,7 +24,7 @@
tid.o timestamp.o varbit.o varchar.o varlena.o version.o xid.o \
network.o mac.o inet_net_ntop.o inet_net_pton.o \
ri_triggers.o pg_lzcompress.o pg_locale.o formatting.o \
- ascii.o quote.o pgstatfuncs.o encode.o
+ ascii.o quote.o pgstatfuncs.o encode.o dbsize.o
like.o: like.c like_match.c
Index: src/include/catalog/pg_proc.h
===================================================================
RCS file: /projects/cvsroot/pgsql/src/include/catalog/pg_proc.h,v
retrieving revision 1.363
diff -u -r1.363 pg_proc.h
--- src/include/catalog/pg_proc.h 20 May 2005 01:29:55 -0000 1.363
+++ src/include/catalog/pg_proc.h 1 Jun 2005 18:50:38 -0000
@@ -3023,6 +3023,15 @@
DATA(insert OID = 2173 ( pg_stop_backup PGNSP PGUID 12 f f t f v 0 25 "" _null_ _null_ _null_
pg_stop_backup- _null_ ));
DESCR("Finish taking an online backup");
+DATA(insert OID = 2285 ( pg_tablespace_size PGNSP PGUID 12 f f t f v 1 20 "26" _null_ _null_ _null_
pg_tablespace_size- _null_ ));
+DESCR("Calculate total disk space usage for tablespace");
+DATA(insert OID = 2286 ( pg_database_size PGNSP PGUID 12 f f t f v 1 20 "26" _null_ _null_ _null_
pg_database_size- _null_ ));
+DESCR("Calculate total disk space usage for database");
+DATA(insert OID = 2287 ( pg_relation_size PGNSP PGUID 12 f f t f v 1 20 "26" _null_ _null_ _null_
pg_relation_size- _null_ ));
+DESCR("Calculate total disk space usage for relation");
+DATA(insert OID = 2288 ( pg_size_pretty PGNSP PGUID 12 f f t f v 1 25 "20" _null_ _null_ _null_
pg_size_pretty- _null_ ));
+DESCR("Convert a long int to a human readable text using size units");
+
/* Aggregates (moved here from pg_aggregate for 7.3) */
Index: src/include/utils/builtins.h
===================================================================
RCS file: /projects/cvsroot/pgsql/src/include/utils/builtins.h,v
retrieving revision 1.257
diff -u -r1.257 builtins.h
--- src/include/utils/builtins.h 27 May 2005 00:57:49 -0000 1.257
+++ src/include/utils/builtins.h 1 Jun 2005 18:50:41 -0000
@@ -364,6 +364,12 @@
extern Datum pg_cancel_backend(PG_FUNCTION_ARGS);
extern Datum pg_tablespace_databases(PG_FUNCTION_ARGS);
+/* dbsize.c */
+extern Datum pg_tablespace_size(PG_FUNCTION_ARGS);
+extern Datum pg_database_size(PG_FUNCTION_ARGS);
+extern Datum pg_relation_size(PG_FUNCTION_ARGS);
+extern Datum pg_size_pretty(PG_FUNCTION_ARGS);
+
/* not_in.c */
extern Datum int4notin(PG_FUNCTION_ARGS);
extern Datum oidnotin(PG_FUNCTION_ARGS);
/*
* dbsize.c
* object size functions
*
* Copyright (c) 2002-2005, PostgreSQL Global Development Group
*
* IDENTIFICATION
* $PostgreSQL: pgsql/contrib/dbsize/dbsize.c,v 1.17 2005/05/27 00:57:48 neilc Exp $
*
*/
#include "postgres.h"
#include <sys/types.h>
#include <sys/stat.h>
#include "access/heapam.h"
#include "catalog/namespace.h"
#include "catalog/pg_tablespace.h"
#include "commands/dbcommands.h"
#include "miscadmin.h"
#include "storage/fd.h"
#include "utils/builtins.h"
#include "utils/syscache.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;
}
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;
}
/*
* calculate total size of tablespace
*/
Datum
pg_tablespace_size(PG_FUNCTION_ARGS)
{
Oid tblspcOid = PG_GETARG_OID(0);
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)));
totalsize += fst.st_size;
if (fst.st_mode & S_IFDIR)
totalsize += db_dir_size(pathname);
}
FreeDir(dirdesc);
PG_RETURN_INT64(totalsize);
}
/*
* calculate size of database in all tablespaces
*/
Datum
pg_database_size(PG_FUNCTION_ARGS)
{
Oid dbOid = PG_GETARG_OID(0);
PG_RETURN_INT64(calculate_database_size(dbOid));
}
/* Calculate relation size given tablespace and relation OIDs */
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;
}
/*
* calculate size of relation
*/
Datum
pg_relation_size(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));
}
/*
* 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);
}
pgsql-patches by date: