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Database statistics for PostgreSQL

Distribution: official part of Check_MK
License: GPL
Supported Agents: Linux

This check handles the metrics returned from PostgreSQL's statistics functions pg_stat_database and pg_database_size. It allows monitoring of disk blocks read, but PostgreSQL seems to not have a simple "written bytes" or "write IOs" counter, meaning this information cannot be directly monitored.

Instead, the check allows more fine-grained monitoring of database activity by tracking what the queries really do. You can monitor both "read statements" like fetches, as well as "write statements as update/delete/insert. Finally it allows monitoring of commits, which PostgreSQL tracks down to the sub-transaction level.

You can then define levels on the per-second amount of the statements.

This check relies on data reported by the agent-side plugin mk_postgres

Discovery

One item is generated per database.