diff options
Diffstat (limited to 'doc/src')
| -rw-r--r-- | doc/src/sgml/monitoring.sgml | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/doc/src/sgml/monitoring.sgml b/doc/src/sgml/monitoring.sgml index acfccc4c997..8c4f2b7db1a 100644 --- a/doc/src/sgml/monitoring.sgml +++ b/doc/src/sgml/monitoring.sgml @@ -1,4 +1,4 @@ -<!-- $PostgreSQL: pgsql/doc/src/sgml/monitoring.sgml,v 1.67 2009/04/09 22:32:02 momjian Exp $ --> +<!-- $PostgreSQL: pgsql/doc/src/sgml/monitoring.sgml,v 1.68 2009/04/10 03:13:36 momjian Exp $ --> <chapter id="monitoring"> <title>Monitoring Database Activity</title> @@ -927,8 +927,9 @@ postgres: <replaceable>user</> <replaceable>database</> <replaceable>host</> <re <function>pg_stat_get_blocks_fetched</function> minus <function>pg_stat_get_blocks_hit</function> gives the number of kernel <function>read()</> calls issued for the table, index, or - database; but the actual number of physical reads is usually - lower due to kernel-level buffering. + database; the number of actual physical reads is usually + lower due to kernel-level buffering. The <literal>*_blks_read</> + statistics columns uses this subtraction, i.e. fetched minus hit. </para> </note> |