2009/8/13 <kbarnard@kevinbarnard.net>:
> I am working on cleaning up a bloated database. I have been reindexing etc.
> There appear to be a good number of never to almost never used indexes. I
> am looking in pg_stat_user_indexes which yields some questions.
>
> Assuming that the reset stats on server is not turned on how old are stats?
>
Old as your first start of the server. Except if you made a
total dump of the database that could erase them.
> Are there any good open source tools to monitor how often indexes are used?
>
It's too specific. But your question is interesting to analyze
this kind of features.
> I was basically thinking of writing end of day numbers for the stats in a
> table so I can plot index usage over a few months to see what is getting
> used. Does anybody see a problem with that?
>
Could be for the firsts months, then you will not need it
any more. but sounds charm for me. If i can offer some code
let me know :)
--
Emanuel Calvo Franco
Database consultant at:
www.siu.edu.ar
www.emanuelcalvofranco.com.ar