Re: nasty SCSI performance drop-outs (potential test case)

2001-05-11 Thread Mark Hemment
On Fri, 11 May 2001, null wrote: > Time to mkfs the same two 5GB LUNs in parallel is 54 seconds. Hmmm. > Bandwidth on two CPUs is totally consumed (99.9%) and a third CPU is > usually consumed by the kupdated process. Activity lights on the storage > device are mostly idle during this time.

nasty SCSI performance drop-outs (potential test case)

2001-05-11 Thread null
On Tue, 10 Apr 2001, Rik van Riel wrote: > On Tue, 10 Apr 2001, Alan Cox wrote: > > > > Any time I start injecting lots of mail into the qmail queue, > > > *one* of the two processors gets pegged at 99%, and it takes forever > > > for anything typed at the console to actually appear (just as you

nasty SCSI performance drop-outs (potential test case)

2001-05-11 Thread null
On Tue, 10 Apr 2001, Rik van Riel wrote: On Tue, 10 Apr 2001, Alan Cox wrote: Any time I start injecting lots of mail into the qmail queue, *one* of the two processors gets pegged at 99%, and it takes forever for anything typed at the console to actually appear (just as you