October 2010
Intermediate to advanced
468 pages
11h 35m
English
Content preview from PostgreSQL 9.0 High PerformanceBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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There are two types of information you can monitor from the database. The main statistics are stored into counters. These counters start at 0 when you create a new database cluster, increasing with all activity related to that statistic. Counters in this category include pg_stat_database, pg_stat_bgwriter, and all of the other views whose names start with pg_stat.
The exact way that you reset these counters back to 0 again varies quite a bit based on your PostgreSQL version:
- Version 8.1:
pg_stat_reset()resets all statistics. Enablingstats_reset_on_server_startin thepostgresql.conffile will reset everything each time the server is started. - Version 8.2:
pg_stat_reset()resets just block and row level statistics. Enabling ...
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