postgresql/contrib/pgstattuple/README.pgstattuple.euc_jp

$Id: README.pgstattuple.euc_jp,v 1.2 2001/12/20 01:56:08 ishii Exp $

pgstattuple README		2001/10/01 <20>а<EFBFBD>ã<EFBFBD><C3A3>

1. pgstattuple<6C>Ȥ<EFBFBD>

   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>
   <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>
   <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
   <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>

   <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>
   <20><><EFBFBD>Ǥ˽<C7A4><CBBD>Ϥ<EFBFBD><CFA4>ޤ<EFBFBD><DEA4><EFBFBD>

test=# select pgstattuple('tellers');
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%
 pgstattuple 
-------------
       18.75
(1 row)

   <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>
   <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>θ<EFBFBD><CEB8><EFBFBD><EFBFBD><EFBFBD><EFBFBD>񤤤Ƥ<F1A4A4A4><C6A4><EFBFBD><EFBFBD>ޤ<EFBFBD><DEA4><EFBFBD>

   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>
   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>
			<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>
			<09><>Ψ<EFBFBD><CEA8>ɽ<EFBFBD><C9BD><EFBFBD><EFBFBD><EFBFBD>ޤ<EFBFBD><DEA4><EFBFBD>
   dead tuples		<09><><EFBFBD>ߤˤʤä<CAA4><C3A4><EFBFBD><EFBFBD>ץ<EFBFBD><D7A5>˴ؤ<CBB4><D8A4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
   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>
   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

2. pgstattuple<6C>Υ<EFBFBD><CEA5>󥹥ȡ<F3A5B9A5><C8A1><EFBFBD>

   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>
   <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>

    $ make
    $ make install

    <20>桼<EFBFBD><E6A1BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ؿ<EFBFBD><D8BF><EFBFBD><EFBFBD><EFBFBD>Ͽ<EFBFBD><CFBF><EFBFBD>ޤ<EFBFBD><DEA4><EFBFBD>

    $ psql -e -f /usr/local/pgsql/share/contrib/pgstattuple.sql test


3. pgstattuple<6C>λȤ<CEBB><C8A4><EFBFBD>

   pgstattuple<6C>θƤӽФ<D3BD><D0A4><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϰʲ<CFB0><CAB2>Ǥ<EFBFBD><C7A4><EFBFBD>

   pgstattuple(NAME) RETURNS FLOAT8

   <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>: <20>ơ<EFBFBD><C6A1>֥<EFBFBD>̾

   <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>
   <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>

   <20>ʤ<EFBFBD><CAA4><EFBFBD>pgstattuple<6C>ϥơ<CFA5><C6A1>֥<EFBFBD><D6A5><EFBFBD>AccessShareLock<63><6B><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʤ<EFBFBD><CAA4>Τǡ<CEA4>
   pgstattuple <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>
   <20>ʤ<EFBFBD><CAA4><EFBFBD><EFBFBD>̤<EFBFBD><CCA4>֤<EFBFBD><D6A4><EFBFBD>ǽ<EFBFBD><C7BD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ޤ<EFBFBD><DEA4><EFBFBD>

   pgstattuple<6C><65><EFBFBD><EFBFBD><EFBFBD>ץ<EFBFBD><D7A5><EFBFBD><EFBFBD>֥<EFBFBD><D6A5>ߡפ<DFA1>Ƚ<EFBFBD>Ǥ<EFBFBD><C7A4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϡ<EFBFBD>
   HeapTupleSatisfiesNow()<29><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֤<EFBFBD><D6A4><EFBFBD><EFBFBD>Ȥ<EFBFBD><C8A4>Ǥ<EFBFBD><C7A4><EFBFBD>

4. pgstattuple<6C>Υ饤<CEA5><E9A5A4><EFBFBD>󥹾<EFBFBD><F3A5B9BE><EFBFBD><EFBFBD>ˤĤ<CBA4><C4A4><EFBFBD>

   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>
   <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>
   <20><><EFBFBD><EFBFBD>Ǥ<EFBFBD><C7A4><EFBFBD>餤<EFBFBD>ޤ<EFBFBD><DEA4><EFBFBD><EFBFBD><EFBFBD>

5. <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>

   2001/12/20 Tom Lane<6E>ˤ<EFBFBD><CBA4>뽤<EFBFBD><EBBDA4>

   	Fix pgstattuple to acquire a read lock on the target table.  This
	prevents embarassments such as having the table dropped or truncated
	partway through the scan.  Also, fix free space calculation to include
	pages that currently contain no tuples.

   2001/10/01 PostgreSQL 7.2 <20><>contrib module<6C><65><EFBFBD><EFBFBD>Ͽ

   2001/08/30 pgstattuple <20>С<EFBFBD><D0A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 0.1<EFBFBD><EFBFBD><EFBFBD>꡼<EFBFBD><EFBFBD>