| From: | Mark Wong <markw(at)osdl(dot)org> |
|---|---|
| To: | ITAGAKI Takahiro <itagaki(dot)takahiro(at)lab(dot)ntt(dot)co(dot)jp> |
| Cc: | pgsql-hackers(at)postgresql(dot)org, pgsql-patches(at)postgresql(dot)org |
| Subject: | Re: WAL: O_DIRECT and multipage-writer |
| Date: | 2005-03-22 22:30:13 |
| Message-ID: | 20050322223013.GC12885@osdl.org |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers pgsql-patches |
On Tue, Jan 25, 2005 at 06:06:23PM +0900, ITAGAKI Takahiro wrote:
> Environment:
> OS : Linux kernel 2.6.9
> CPU : Pentium 4 3GHz
> disk : ATA 5400rpm (Data and WAL are placed on same partition.)
> memory : 1GB
> config : shared_buffers=10000, wal_buffers=256,
> XLOG_SEG_SIZE=256MB, checkpoint_segment=4
Hi Itagaki,
In light of this thread, have you compared the performance on
Linux-2.4?
Direct io on block device has performance regression on 2.6.x kernel
http://www.ussg.iu.edu/hypermail/linux/kernel/0503.1/0328.html
Mark
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Oleg Bartunov | 2005-03-22 22:33:04 | Re: odd problem ! |
| Previous Message | Tom Lane | 2005-03-22 22:27:00 | Re: odd problem ! |
| From | Date | Subject | |
|---|---|---|---|
| Next Message | ITAGAKI Takahiro | 2005-03-23 04:55:46 | Re: WAL: O_DIRECT and multipage-writer |
| Previous Message | Tom Lane | 2005-03-22 20:18:22 | Re: improves ExecMakeFunctionResultNoSets |