| From: | Gregory Stark <stark(at)enterprisedb(dot)com> |
|---|---|
| To: | Praveen Kumar N <praveen_n(at)students(dot)iiit(dot)net> |
| Cc: | pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: postgresql shared buffers |
| Date: | 2006-09-08 13:32:21 |
| Message-ID: | 87bqpqa3h6.fsf@enterprisedb.com |
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| Lists: | pgsql-hackers |
Praveen Kumar N <praveen_n(at)students(dot)iiit(dot)net> writes:
> hai...
>
> I have installed postgresql from sourcecode.I would like to know
> how pages are replaced in the bufferpool when we join two relations.I tried to
> trace it by editing files
> pgsql/src/backend/storage/buffer/(bufmgr.c,freelist.c).But i feel still I
> am missing some information after observing extracted information abt buffer
> replacement.
Try
explain select ...
The output may be enlightening.
--
Gregory Stark
EnterpriseDB http://www.enterprisedb.com
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