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

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