postgres/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 <EFBFBD>а<EFBFBD>ã<EFBFBD><EFBFBD>

1. pgstattuple<EFBFBD>Ȥ<EFBFBD>

   pgstattuple<EFBFBD>ϡ<EFBFBD>UPDATE<EFBFBD><EFBFBD>DELETE<EFBFBD>Ǻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>줿<EFBFBD>ơ<EFBFBD><EFBFBD>֥<EFBFBD><EFBFBD>Υ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ΰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>礭<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
   <EFBFBD>ơ<EFBFBD><EFBFBD>֥뼫<EFBFBD>Τ<EFBFBD>ʪ<EFBFBD><EFBFBD>Ū<EFBFBD><EFBFBD><EFBFBD>礭<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ф<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ơ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵѤ<EFBFBD><EFBFBD>ޤ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
   <EFBFBD>ޤꡤ<EFBFBD>ֵ<EFBFBD><EFBFBD>ͤ<EFBFBD><EFBFBD>礭<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ߤ<EFBFBD>¿<EFBFBD><EFBFBD><EFBFBD>Τǡ<EFBFBD>vacuum<EFBFBD>򤫤<EFBFBD><EFBFBD><EFBFBD>ɬ
   <EFBFBD>פ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȥ<EFBFBD><EFBFBD><EFBFBD>Ƚ<EFBFBD>Ǥν<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ˤʤ<EFBFBD><EFBFBD>櫓<EFBFBD>Ǥ<EFBFBD><EFBFBD><EFBFBD>

   <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǤϾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>̤<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʤ<EFBFBD><EFBFBD>Τǡ<EFBFBD>NOTICE<EFBFBD><EFBFBD><EFBFBD>å<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǥ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
   <EFBFBD><EFBFBD><EFBFBD>Ǥ˽<EFBFBD><EFBFBD>Ϥ<EFBFBD><EFBFBD>ޤ<EFBFBD><EFBFBD><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)

   <EFBFBD><EFBFBD><EFBFBD>μ¹<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǥϡ<EFBFBD>19%<EFBFBD>ۤɤ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ߤˤʤäƤ<EFBFBD><EFBFBD>뤳<EFBFBD>Ȥ<EFBFBD><EFBFBD>Ǥ<EFBFBD><EFBFBD>ޤ<EFBFBD><EFBFBD><EFBFBD>NOTICE<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
   <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>θ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>񤤤Ƥ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ޤ<EFBFBD><EFBFBD><EFBFBD>

   physical length	<EFBFBD>ơ<EFBFBD><EFBFBD>֥<EFBFBD><EFBFBD><EFBFBD>ʪ<EFBFBD><EFBFBD>Ū<EFBFBD>ʥ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>MBñ<EFBFBD>̤<EFBFBD>ɽ<EFBFBD><EFBFBD>
   live tuples		<EFBFBD><EFBFBD><EFBFBD>ߤǤϤʤ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ץ<EFBFBD><EFBFBD>˴ؤ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>󡥥<EFBFBD><EFBFBD>ץ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
			<EFBFBD><EFBFBD><EFBFBD>ץ뤬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ΰ<EFBFBD><EFBFBD>ι<EFBFBD><EFBFBD>ס<EFBFBD><EFBFBD>ơ<EFBFBD><EFBFBD>֥<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Τ<EFBFBD><EFBFBD>Ф<EFBFBD><EFBFBD><EFBFBD>
			<EFBFBD><EFBFBD>Ψ<EFBFBD><EFBFBD>ɽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ޤ<EFBFBD><EFBFBD><EFBFBD>
   dead tuples		<EFBFBD><EFBFBD><EFBFBD>ߤˤʤä<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ץ<EFBFBD><EFBFBD>˴ؤ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
   free/reusable space	<EFBFBD><EFBFBD><EFBFBD>Ѳ<EFBFBD>ǽ<EFBFBD><EFBFBD>̤<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ΰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѳ<EFBFBD>ǽ<EFBFBD>ΰ<EFBFBD>
   overhead		<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Τ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ΰ褬<EFBFBD>ơ<EFBFBD><EFBFBD>֥<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Τ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ψ

2. pgstattuple<EFBFBD>Υ<EFBFBD><EFBFBD>󥹥ȡ<EFBFBD><EFBFBD><EFBFBD>

   PostgreSQL<EFBFBD><EFBFBD>/usr/local/pgsql<EFBFBD>˥<EFBFBD><EFBFBD>󥹥ȡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѤǤ<EFBFBD><EFBFBD>ꡤtest<EFBFBD>ǡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>١<EFBFBD>
   <EFBFBD><EFBFBD><EFBFBD><EFBFBD>pgstattuple<EFBFBD>򥤥󥹥ȡ<EFBFBD><EFBFBD>뤹<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>μ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>򼨤<EFBFBD><EFBFBD>ޤ<EFBFBD><EFBFBD><EFBFBD>

    $ make
    $ make install

    <EFBFBD>桼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ؿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ͽ<EFBFBD><EFBFBD><EFBFBD>ޤ<EFBFBD><EFBFBD><EFBFBD>

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


3. pgstattuple<EFBFBD>λȤ<EFBFBD><EFBFBD><EFBFBD>

   pgstattuple<EFBFBD>θƤӽФ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϰʲ<EFBFBD><EFBFBD>Ǥ<EFBFBD><EFBFBD><EFBFBD>

   pgstattuple(NAME) RETURNS FLOAT8

   <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>: <EFBFBD>ơ<EFBFBD><EFBFBD>֥<EFBFBD>̾

   <EFBFBD>ؿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>UPDATE<EFBFBD><EFBFBD>DELETE<EFBFBD>Ǻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>줿<EFBFBD>ơ<EFBFBD><EFBFBD>֥<EFBFBD><EFBFBD>Υ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ΰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>礭<EFBFBD><EFBFBD><EFBFBD>ǡ<EFBFBD>
   <EFBFBD>ơ<EFBFBD><EFBFBD>֥<EFBFBD><EFBFBD><EFBFBD>ʪ<EFBFBD><EFBFBD>Ū<EFBFBD><EFBFBD><EFBFBD>礭<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ф<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>(<EFBFBD>ѡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>)<EFBFBD><EFBFBD><EFBFBD>ֵѤ<EFBFBD><EFBFBD>ޤ<EFBFBD><EFBFBD><EFBFBD>

   <EFBFBD>ʤ<EFBFBD><EFBFBD><EFBFBD>pgstattuple<EFBFBD>ϥơ<EFBFBD><EFBFBD>֥<EFBFBD><EFBFBD><EFBFBD>AccessShareLock<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʤ<EFBFBD><EFBFBD>Τǡ<EFBFBD>
   pgstattuple <EFBFBD><EFBFBD><EFBFBD>¹<EFBFBD><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ơ<EFBFBD><EFBFBD>֥<EFBFBD><EFBFBD>˹<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȯ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
   <EFBFBD>ʤ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>̤<EFBFBD><EFBFBD>֤<EFBFBD><EFBFBD><EFBFBD>ǽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ޤ<EFBFBD><EFBFBD><EFBFBD>

   pgstattuple<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ץ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>֥<EFBFBD><EFBFBD>ߡפ<EFBFBD>Ƚ<EFBFBD>Ǥ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϡ<EFBFBD>
   HeapTupleSatisfiesNow()<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֤<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȥ<EFBFBD><EFBFBD>Ǥ<EFBFBD><EFBFBD><EFBFBD>

4. pgstattuple<EFBFBD>Υ饤<EFBFBD><EFBFBD><EFBFBD>󥹾<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ˤĤ<EFBFBD><EFBFBD><EFBFBD>

   pgstattuple.c<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƭ<EFBFBD>˽񤤤Ƥ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>̤<EFBFBD><EFBFBD>Ǥ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ޤ<EFBFBD><EFBFBD><EFBFBD>pgstattuple <EFBFBD>ϴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̵<EFBFBD><EFBFBD>
   <EFBFBD>ڤǤ<EFBFBD><EFBFBD><EFBFBD>pgstattuple <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѥ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȥˤ<EFBFBD><EFBFBD>ä<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>뤤<EFBFBD><EFBFBD><EFBFBD>ʤ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>̤˴ؤ<EFBFBD><EFBFBD><EFBFBD>
   <EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǥ<EFBFBD><EFBFBD><EFBFBD>餤<EFBFBD>ޤ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>

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

   2001/12/20 Tom Lane<EFBFBD>ˤ<EFBFBD><EFBFBD>뽤<EFBFBD><EFBFBD>

   	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 <EFBFBD><EFBFBD>contrib module<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ͽ

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