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add bugfix in CHANGELOG and some notes in pg README
Closes #192
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# PostgreSQL plugin | ||
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This postgresql plugin provides metrics for your postgres database. It currently works with postgres versions 8.1+. It uses data from the built in _pg_stat_database_ view. The metrics recorded depend on your version of postgres. See table: | ||
``` | ||
pg version 9.2+ 9.1 8.3-9.0 8.1-8.2 7.4-8.0(unsupported) | ||
--- --- --- ------- ------- ------- | ||
datid* x x x x | ||
datname* x x x x | ||
numbackends x x x x x | ||
xact_commit x x x x x | ||
xact_rollback x x x x x | ||
blks_read x x x x x | ||
blks_hit x x x x x | ||
tup_returned x x x | ||
tup_fetched x x x | ||
tup_inserted x x x | ||
tup_updated x x x | ||
tup_deleted x x x | ||
conflicts x x | ||
temp_files x | ||
temp_bytes x | ||
deadlocks x | ||
blk_read_time x | ||
blk_write_time x | ||
stats_reset* x x | ||
``` | ||
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_* value ignored and therefore not recorded._ | ||
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More information about the meaning of these metrics can be found in the [PostgreSQL Documentation](http://www.postgresql.org/docs/9.2/static/monitoring-stats.html#PG-STAT-DATABASE-VIEW) |