| From: | "Simon Riggs" <simon(at)2ndquadrant(dot)com> |
|---|---|
| To: | "Heikki Linnakangas" <heikki(at)enterprisedb(dot)com> |
| Cc: | "PostgreSQL-development" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Bgwriter strategies |
| Date: | 2007-07-06 10:53:04 |
| Message-ID: | 1183719184.4488.38.camel@ebony.site |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
On Thu, 2007-07-05 at 21:50 +0100, Heikki Linnakangas wrote:
> All test runs were also patched to count the # of buffer allocations,
> and # of buffer flushes performed by bgwriter and backends. Here's those
> results (I hope the intendation gets through properly):
>
> imola-336 imola-337 imola-340
> writes by checkpoint 38302 30410 39529
> writes by bgwriter 350113 2205782 1418672
> writes by backends 1834333 265755 787633
> writes total 2222748 2501947 2245834
> allocations 2683170 2657896 2699974
These results may show that the minimum bgwriter_delay of 10ms may be
too large for the workloads: whatever the strategy used the bgwriter
spends too much time sleeping when it should be working.
--
Simon Riggs
EnterpriseDB http://www.enterprisedb.com
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Dave Page | 2007-07-06 10:53:17 | Re: script binaries renaming |
| Previous Message | Simon Riggs | 2007-07-06 10:50:51 | Re: Bgwriter strategies |