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Add pgstattuple
This commit is contained in:
Tatsuo Ishii
22
contrib/pgstattuple/Makefile
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22
contrib/pgstattuple/Makefile
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@ -0,0 +1,22 @@
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#-------------------------------------------------------------------------
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#
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# pgstattuple Makefile
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#
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# $Id: Makefile,v 1.1 2001/10/01 01:52:38 ishii Exp $
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#
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#-------------------------------------------------------------------------
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subdir = contrib/pgstattuple
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top_builddir = ../..
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include $(top_builddir)/src/Makefile.global
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MODULE_big := pgstattuple
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SRCS += pgstattuple.c
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OBJS := $(SRCS:.c=.o)
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DOCS := README.pgstattuple README.pgstattuple.euc_jp
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DATA_built := pgstattuple.sql
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PG_CPPFLAGS :=
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SHLIB_LINK :=
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include $(top_srcdir)/contrib/contrib-global.mk
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47
contrib/pgstattuple/README.pgstattuple
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47
contrib/pgstattuple/README.pgstattuple
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@ -0,0 +1,47 @@
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pgstattuple README 2001/10/01 Tatsuo Ishii
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1. What is pgstattuple?
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pgstattuple returns the percentage of the "dead" tuples of a
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table. This will help users to judge if vacuum is needed.
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In addition, pgstattuple prints more detailed information using
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NOTICE.
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test=# select pgstattuple('tellers');
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NOTICE: physical length: 0.08MB live tuples: 20 (0.00MB, 1.17%) dead tuples: 320 (0.01MB, 18.75%) free/reusable space: 0.01MB (18.06%) overhead: 62.02%
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pgstattuple
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-------------
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18.75
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(1 row)
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Above example shows tellers tables includes 18.75% dead tuples.
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physical length physical size of the table in MB
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live tuples information on the live tuples
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dead tuples information on the dead tuples
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free/reusable space available space
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overhead overhead space
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2. Installing pgstattuple
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$ make
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$ make install
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$ psql -e -f /usr/local/pgsql/share/contrib/pgstattuple.sql test
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3. Using pgstattuple
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pgstattuple can be called as a function:
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pgstattuple(NAME) RETURNS FLOAT8
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The argument is the table name. pgstattuple returns the percentage
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of the "dead" tuples of a table.
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4. Notes
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pgstattuple does not lock the target table at all. So concurrent
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update may affect the result.
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pgstattuple judges a tuple is "dead" if HeapTupleSatisfiesNow()
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returns false.
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70
contrib/pgstattuple/README.pgstattuple.euc_jp
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70
contrib/pgstattuple/README.pgstattuple.euc_jp
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@ -0,0 +1,70 @@
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$Id: README.pgstattuple.euc_jp,v 1.1 2001/10/01 01:52:38 ishii Exp $
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pgstattuple README 2001/10/01 <20>а<EFBFBD>ã<EFBFBD><C3A3>
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1. pgstattuple<6C>Ȥ<EFBFBD>
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pgstattuple<6C>ϡ<EFBFBD>UPDATE<54><45>DELETE<54>Ǻ<EFBFBD><C7BA><EFBFBD><EFBFBD>줿<EFBFBD>ơ<EFBFBD><C6A1>֥<EFBFBD><D6A5>Υ<EFBFBD><CEA5><EFBFBD><EFBFBD>ΰ<EFBFBD><CEB0><EFBFBD><EFBFBD>礭<EFBFBD><E7A4AD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
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<20>ơ<EFBFBD><C6A1>֥뼫<D6A5>Τ<EFBFBD>ʪ<EFBFBD><CAAA>Ū<EFBFBD><C5AA><EFBFBD>礭<EFBFBD><E7A4AD><EFBFBD><EFBFBD><EFBFBD>Ф<EFBFBD><D0A4><EFBFBD><EFBFBD>ѡ<EFBFBD><D1A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ơ<EFBFBD><C6A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵѤ<D6B5><D1A4>ޤ<EFBFBD><DEA4><EFBFBD><EFBFBD><EFBFBD>
|
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<20>ޤꡤ<DEA4>ֵ<EFBFBD><D6B5>ͤ<EFBFBD><CDA4>礭<EFBFBD><E7A4AD><EFBFBD><EFBFBD><EFBFBD>С<EFBFBD><D0A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ߤ<EFBFBD>¿<EFBFBD><C2BF><EFBFBD>Τǡ<CEA4>vacuum<75><EFBFBD><F2A4ABA4><EFBFBD>ɬ
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<20>פ<EFBFBD><D7A4><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȥ<EFBFBD><C8A4><EFBFBD>Ƚ<EFBFBD>Ǥν<C7A4><CEBD><EFBFBD><EFBFBD>ˤʤ<CBA4><CAA4>櫓<EFBFBD>Ǥ<EFBFBD><C7A4><EFBFBD>
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<20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǤϾ<C7A4><CFBE><EFBFBD><EFBFBD>̤<EFBFBD><CCA4><EFBFBD><EFBFBD>ʤ<EFBFBD><CAA4>Τǡ<CEA4>NOTICE<43><45><EFBFBD>å<EFBFBD><C3A5><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǥ<EFBFBD><C7A4><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><CABE><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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<20><><EFBFBD>Ǥ˽<C7A4><CBBD>Ϥ<EFBFBD><CFA4>ޤ<EFBFBD><DEA4><EFBFBD>
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test=# select pgstattuple('tellers');
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NOTICE: physical length: 0.08MB live tuples: 20 (0.00MB, 1.17%) dead tuples: 320 (0.01MB, 18.75%) free/reusable space: 0.01MB (18.06%) overhead: 62.02%
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pgstattuple
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-------------
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18.75
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(1 row)
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<20><><EFBFBD>μ¹<CEBC><C2B9><EFBFBD><EFBFBD>Ǥϡ<C7A4>19%<25>ۤɤ<DBA4><C9A4><EFBFBD><EFBFBD>ߤˤʤäƤ<C3A4><C6A4>뤳<EFBFBD>Ȥ<EFBFBD><C8A4>Ǥ<EFBFBD><C7A4>ޤ<EFBFBD><DEA4><EFBFBD>NOTICE<43><45><EFBFBD><EFBFBD>
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<20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>θ<EFBFBD><CEB8><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƥ<F1A4A4A4><C6A4><EFBFBD><EFBFBD>ޤ<EFBFBD><DEA4><EFBFBD>
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physical length <09>ơ<EFBFBD><C6A1>֥<EFBFBD><D6A5><EFBFBD>ʪ<EFBFBD><CAAA>Ū<EFBFBD>ʥ<EFBFBD><CAA5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>MBñ<42>̤<EFBFBD>ɽ<EFBFBD><C9BD>
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live tuples <09><><EFBFBD>ߤǤϤʤ<CFA4><CAA4><EFBFBD><EFBFBD>ץ<EFBFBD><D7A5>˴ؤ<CBB4><D8A4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><F3A1A5A5>ץ<EFBFBD><D7A5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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<09><><EFBFBD>ץ뤬<D7A5><EBA4AC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ΰ<EFBFBD><CEB0>ι<EFBFBD><CEB9>ס<EFBFBD><D7A1>ơ<EFBFBD><C6A1>֥<EFBFBD><D6A5><EFBFBD><EFBFBD>Τ<EFBFBD><CEA4>Ф<EFBFBD><D0A4><EFBFBD>
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<09><>Ψ<EFBFBD><CEA8>ɽ<EFBFBD><C9BD><EFBFBD><EFBFBD><EFBFBD>ޤ<EFBFBD><DEA4><EFBFBD>
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dead tuples <09><><EFBFBD>ߤˤʤä<CAA4><C3A4><EFBFBD><EFBFBD>ץ<EFBFBD><D7A5>˴ؤ<CBB4><D8A4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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free/reusable space <09><><EFBFBD>Ѳ<EFBFBD>ǽ<EFBFBD><C7BD>̤<EFBFBD><CCA4><EFBFBD><EFBFBD><EFBFBD>ΰ<EFBFBD><CEB0><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѳ<EFBFBD>ǽ<EFBFBD>ΰ<EFBFBD>
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overhead <09><><EFBFBD><EFBFBD><EFBFBD>Τ<EFBFBD><CEA4><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ΰ褬<CEB0>ơ<EFBFBD><C6A1>֥<EFBFBD><D6A5><EFBFBD><EFBFBD>Τ<EFBFBD><CEA4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ψ
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2. pgstattuple<6C>Υ<EFBFBD><CEA5>ȡ<F3A5B9A5><C8A1><EFBFBD>
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PostgreSQL<51><4C>/usr/local/pgsql<71>˥<EFBFBD><CBA5>ȡ<F3A5B9A5><C8A1><EFBFBD><EFBFBD>ѤǤ<D1A4><C7A4>ꡤtest<73>ǡ<EFBFBD><C7A1><EFBFBD><EFBFBD>١<EFBFBD>
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<20><><EFBFBD><EFBFBD>pgstattuple<6C>ȡ<F3A5B9A5><C8A1>뤹<EFBFBD><EBA4B9><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>μ<EFBFBD><CEBC><EFBFBD><EFBFBD><EFBFBD><F2BCA8A4>ޤ<EFBFBD><DEA4><EFBFBD>
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$ make
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$ make install
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<20>桼<EFBFBD><E6A1BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ؿ<EFBFBD><D8BF><EFBFBD><EFBFBD><EFBFBD>Ͽ<EFBFBD><CFBF><EFBFBD>ޤ<EFBFBD><DEA4><EFBFBD>
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$ psql -e -f /usr/local/pgsql/share/contrib/pgstattuple.sql test
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3. pgstattuple<6C>λȤ<CEBB><C8A4><EFBFBD>
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pgstattuple<6C>θƤӽФ<D3BD><D0A4><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϰʲ<CFB0><CAB2>Ǥ<EFBFBD><C7A4><EFBFBD>
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pgstattuple(NAME) RETURNS FLOAT8
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<20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>: <20>ơ<EFBFBD><C6A1>֥<EFBFBD>̾
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<20>ؿ<EFBFBD><D8BF><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>UPDATE<54><45>DELETE<54>Ǻ<EFBFBD><C7BA><EFBFBD><EFBFBD>줿<EFBFBD>ơ<EFBFBD><C6A1>֥<EFBFBD><D6A5>Υ<EFBFBD><CEA5><EFBFBD><EFBFBD>ΰ<EFBFBD><CEB0><EFBFBD><EFBFBD>礭<EFBFBD><E7A4AD><EFBFBD>ǡ<EFBFBD>
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<20>ơ<EFBFBD><C6A1>֥<EFBFBD><D6A5><EFBFBD>ʪ<EFBFBD><CAAA>Ū<EFBFBD><C5AA><EFBFBD>礭<EFBFBD><E7A4AD><EFBFBD><EFBFBD><EFBFBD>Ф<EFBFBD><D0A4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>(<28>ѡ<EFBFBD><D1A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>)<29><><EFBFBD>ֵѤ<D6B5><D1A4>ޤ<EFBFBD><DEA4><EFBFBD>
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<20>ʤ<EFBFBD><CAA4><EFBFBD>pgstattuple<6C>ϥơ<CFA5><C6A1>֥<EFBFBD><D6A5>˰<EFBFBD><CBB0>ڥ<EFBFBD><DAA5>å<EFBFBD><C3A5><EFBFBD><F2A4ABA4>ʤ<EFBFBD><CAA4>Τǡ<CEA4>pgstattuple
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<20><><EFBFBD>¹<EFBFBD><C2B9><EFBFBD><EFBFBD>˳<EFBFBD><CBB3><EFBFBD><EFBFBD>ơ<EFBFBD><C6A1>֥<EFBFBD><D6A5>˹<EFBFBD><CBB9><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȯ<EFBFBD><C8AF><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʤ<EFBFBD><CAA4><EFBFBD><EFBFBD>̤<EFBFBD><CCA4><EFBFBD>
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<20><><EFBFBD><EFBFBD>ǽ<EFBFBD><C7BD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ޤ<EFBFBD><DEA4><EFBFBD>
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4. pgstattuple<6C>Υ饤<CEA5><E9A5A4><EFBFBD><EFBFBD><F3A5B9BE><EFBFBD><EFBFBD>ˤĤ<CBA4><C4A4><EFBFBD>
|
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pgstattuple.c<><63><EFBFBD><EFBFBD>Ƭ<EFBFBD>˽Ƥ<F1A4A4A4><C6A4><EFBFBD><EFBFBD>̤<EFBFBD><CCA4>Ǥ<EFBFBD><C7A4><EFBFBD><EFBFBD>ޤ<EFBFBD><DEA4><EFBFBD>pgstattuple <20>ϴ<EFBFBD><CFB4><EFBFBD><EFBFBD><EFBFBD>̵<EFBFBD><CCB5>
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<20>ڤǤ<DAA4><C7A4><EFBFBD>pgstattuple <20><><EFBFBD><EFBFBD><EFBFBD>Ѥ<EFBFBD><D1A4><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȥˤ<C8A4><CBA4>ä<EFBFBD><C3A4><EFBFBD><EFBFBD><EFBFBD><EFBFBD>뤤<EFBFBD><EBA4A4><EFBFBD>ʤ<EFBFBD><CAA4><EFBFBD><EFBFBD>̤˴ؤ<CBB4><D8A4><EFBFBD>
|
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<20><><EFBFBD><EFBFBD>Ǥ<EFBFBD><C7A4><EFBFBD>餤<EFBFBD>ޤ<EFBFBD><DEA4><EFBFBD><EFBFBD><EFBFBD>
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5. <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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2001/10/01 PostgreSQL 7.2 <20><>contrib module<6C><65><EFBFBD><EFBFBD>Ͽ
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2001/08/30 pgstattuple <20>С<EFBFBD><D0A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 0.1<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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131
contrib/pgstattuple/pgstattuple.c
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131
contrib/pgstattuple/pgstattuple.c
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/*
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* $Header: /cvsroot/pgsql/contrib/pgstattuple/pgstattuple.c,v 1.1 2001/10/01 01:52:38 ishii Exp $
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*
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* Copyright (c) 2001 Tatsuo Ishii
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*
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* Permission to use, copy, modify, and distribute this software and
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* its documentation for any purpose, without fee, and without a
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* written agreement is hereby granted, provided that the above
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* copyright notice and this paragraph and the following two
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* paragraphs appear in all copies.
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*
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE TO ANY PARTY FOR DIRECT,
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* INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING
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* LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS
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* DOCUMENTATION, EVEN IF THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* THE AUTHOR SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
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* A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS
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* IS" BASIS, AND THE AUTHOR HAS NO OBLIGATIONS TO PROVIDE MAINTENANCE,
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* SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*/
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#include "postgres.h"
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#include "fmgr.h"
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#include "access/heapam.h"
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#include "access/transam.h"
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PG_FUNCTION_INFO_V1(pgstattuple);
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extern Datum pgstattuple(PG_FUNCTION_ARGS);
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/* ----------
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* pgstattuple:
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* returns the percentage of dead tuples
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*
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* C FUNCTION definition
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* pgstattuple(NAME) returns FLOAT8
|
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* ----------
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*/
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Datum
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pgstattuple(PG_FUNCTION_ARGS)
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{
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Name p = PG_GETARG_NAME(0);
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Relation rel;
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HeapScanDesc scan;
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HeapTuple tuple;
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BlockNumber nblocks;
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BlockNumber block = InvalidBlockNumber;
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double table_len;
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uint64 tuple_len = 0;
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uint64 dead_tuple_len = 0;
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uint32 tuple_count = 0;
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uint32 dead_tuple_count = 0;
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double tuple_percent;
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double dead_tuple_percent;
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Buffer buffer = InvalidBuffer;
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uint64 free_space = 0; /* free/reusable space in bytes */
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double free_percent; /* free/reusable space in % */
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rel = heap_openr(NameStr(*p), NoLock);
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nblocks = RelationGetNumberOfBlocks(rel);
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scan = heap_beginscan(rel, false, SnapshotAny, 0, NULL);
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while ((tuple = heap_getnext(scan,0)))
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{
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if (HeapTupleSatisfiesNow(tuple->t_data))
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{
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tuple_len += tuple->t_len;
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tuple_count++;
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}
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else
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{
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dead_tuple_len += tuple->t_len;
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dead_tuple_count++;
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}
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if (!BlockNumberIsValid(block) ||
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block != BlockIdGetBlockNumber(&tuple->t_self.ip_blkid))
|
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{
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block = BlockIdGetBlockNumber(&tuple->t_self.ip_blkid);
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buffer = ReadBuffer(rel, block);
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free_space += PageGetFreeSpace((Page)BufferGetPage(buffer));
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ReleaseBuffer(buffer);
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}
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}
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heap_endscan(scan);
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heap_close(rel, NoLock);
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||||
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table_len = (double)nblocks*BLCKSZ;
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if (nblocks == 0)
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{
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tuple_percent = 0.0;
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dead_tuple_percent = 0.0;
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||||
free_percent = 0.0;
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}
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else
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{
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tuple_percent = (double)tuple_len*100.0/table_len;
|
||||
dead_tuple_percent = (double)dead_tuple_len*100.0/table_len;
|
||||
free_percent = (double)free_space*100.0/table_len;
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}
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||||
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elog(NOTICE,"physical length: %.2fMB live tuples: %u (%.2fMB, %.2f%%) dead tuples: %u (%.2fMB, %.2f%%) free/reusable space: %.2fMB (%.2f%%) overhead: %.2f%%",
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||||
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||||
table_len/1024/1024, /* phsical length in MB */
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||||
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||||
tuple_count, /* number of live tuples */
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||||
(double)tuple_len/1024/1024, /* live tuples in MB */
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||||
tuple_percent, /* live tuples in % */
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||||
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||||
dead_tuple_count, /* number of dead tuples */
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||||
(double)dead_tuple_len/1024/1024, /* dead tuples in MB */
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||||
dead_tuple_percent, /* dead tuples in % */
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||||
|
||||
(double)free_space/1024/1024, /* free/available space in MB */
|
||||
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||||
free_percent, /* free/available space in % */
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||||
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||||
/* overhead in % */
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||||
(nblocks == 0)?0.0: 100.0
|
||||
- tuple_percent
|
||||
- dead_tuple_percent
|
||||
- free_percent);
|
||||
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||||
PG_RETURN_FLOAT8(dead_tuple_percent);
|
||||
}
|
||||
4
contrib/pgstattuple/pgstattuple.sql.in
Normal file
4
contrib/pgstattuple/pgstattuple.sql.in
Normal file
@ -0,0 +1,4 @@
|
||||
DROP FUNCTION pgstattuple(NAME);
|
||||
CREATE FUNCTION pgstattuple(NAME) RETURNS FLOAT8
|
||||
AS 'MODULE_PATHNAME', 'pgstattuple'
|
||||
LANGUAGE 'c' WITH (isstrict);
|
||||
Reference in New Issue
Block a user