Re: onbar's CPU usage

briceavila@hotmail.com (Brice Avila) wrote in message news:<c46e3ec5.0305290549.5ca56c32@posting.google.com>... > Richard Kofler <richard.kofler@chello.at> wrote in message news:<3ED537A5.8CC5439A@chello.at>... > > vijay wrote: > > > > > > My 9.3 IDS instance runs on an IBM RS6000 server( 4-way SP winterhawk > > > node 450 MHz running AIX). Everytime an onbar logical log backup kicks > > > off, I have noticed that it takes 25% of CPU resources(1 CPU). > > > Can somebody explain why the logical log backup process is so resource > > > intensive(all it should be doing is moving records from the logical > > > log on disk to the tape sub-system)? > > > Thanks > > > > > > -- Vijay Venkatesh > > > > are you using TIVOLI TSM? > > > > This might explain it ...... > > > > And no, that is not sarkasm. > > > > If not so, then start top and find out if it is the onbar > > process or a CPUvp or whatever consumes all cyc1es of 1 of your CPUs > > > > dic_k > > I've used Legato and Veritas, and haven't noticed the CPU usage you've > seen with onbar. I haven't used Legato for a few years, but I don't > remember behavior like this. My Veritas NetBackup 4.5 backups barely > register a blip in onbar CPU usage. Hope this helps. > > Brice Avila > Minneapolis, Minnesota Yes, I am using TSM(4.1). I am reasonably confident that it is the onbar process that consumes a CPU, from the CPU time it consumes on a ps aux. Top should more or less return the same. Is there a reason you thought that onbar with TSM would do this and not onbar with say Legato like Brice is using? Thanks.