| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Gavin Hamill <gdh(at)acentral(dot)co(dot)uk> |
| Cc: | pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Further reduction of bufmgr lock contention |
| Date: | 2006-05-23 16:05:34 |
| Message-ID: | 14969.1148400334@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Gavin Hamill <gdh(at)acentral(dot)co(dot)uk> writes:
> It's been about a month since the last activity on bufmgr as documented
> on the hackers list and I was just concerned that this issue had been
> filed as an interesting toy at the time, but now left for the circular
> filing cabinet :)
> Tom + Simon were able to see a fairly easy 25% performance boost against
> our dataset and I'd obv. be very keen to see this work make it into
> 8.1.4 or 8.2.0 :)
We're certainly not putting any such thing into 8.1.*. The proposed
patch for 8.2 is stalled ATM because of the problem of not having a
predictable size for the per-partition hash tables. Fixed-size shared
memory is a harsh mistress :-(
regards, tom lane
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