| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Vivek Khera <khera(at)kcilink(dot)com> |
| Cc: | pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: 8rc2 & BLCKSZ |
| Date: | 2004-12-22 21:04:50 |
| Message-ID: | 20322.1103749490@sss.pgh.pa.us |
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| Lists: | pgsql-performance |
Vivek Khera <khera(at)kcilink(dot)com> writes:
> One of the suggestions handed to me a long time ago for speeding up PG
> on FreeBSD was to double the default blocksize in PG. I tried it, but
> found not a significant enough speed up to make it worth the trouble
> to remember to patch every version of Pg during the upgrade path (ie,
> 7.4.0 -> 7.4.2 etc.) Forgetting to do that would be disastrous!
Not really --- the postmaster will refuse to start if the BLCKSZ shown
in pg_control doesn't match what is compiled in. I concur though that
there may be no significant performance gain. For some workloads there
may well be a performance loss from increasing BLCKSZ.
regards, tom lane
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