On Fri, Nov 25, 2011 at 11:39 AM, Alvaro Herrera <alvhe...@commandprompt.com> wrote: > I'm going to push this now anyway, thanks.
This patch adds a count of the number of buffers dirtied to VACUUM, but it strikes me that it would be useful to add similar tracking to pgBufferUsage. Attached is a patch for that. You can see the new counters through pg_stat_statements or with EXPLAIN (ANALYZE, BUFFERS). This is useful because the number of buffers that a query *writes* doesn't necessarily have much to do with anything - it may end up writing buffers dirtied by other queries while being read-only itself, or conversely it may not write anything at all even though it dirties quite a bit. Thoughts? Comments? Objections? -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company
dirty_buffers.patch
Description: Binary data
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