On Fri, Aug 06, 1999, Jim Arnott <[EMAIL PROTECTED]> wrote:
>
> Thanks for all your help and pointers. Looks like its the disk bandwith. When I
> take out the fsync's in qmail-queue it drops down to 24 seconds (41.6/sec).
>
> SUMMARY:
>
> Could only inject a 1000 byte file into the queue at a rate of 13.6/sec.
> On a ~433 Alpha with Digital UNIX 4.0.
>
> CONCLUSION:
>
> The queue is very disk intensive and all writes are fsync'ed.
>
> Things to try:
>
> (thanks to David Dyer-Bennet,Daemeon Reiydelle, [EMAIL PROTECTED],
> [EMAIL PROTECTED])
>
> Remove the fsync call in qmail-queue.c
> Use a battery backed ram drive.
> Send directly before queing and queue those that fail (does qmail
> support this)
> Performance tune the system
> SCSI controller with write-back cache
> Run qmail-queue directly (qmail-queue does the fsync's though)
This still seems VERY slow, esp for Digital Unix. Which patch version of
Digital Unix are you using? What kind of partition are you writing to?
AdvFS or UFS?
JE
