Another odd feature of this system is there are 16 cpu s.... I almost wonder if there is some spin-lock issue.... Any suggestions who to get more information on this issue... the RH 4.8 sysctl parms seem pretty bare ... JYard UCLA -----Original Message----- From: redhat-list-bounces@xxxxxxxxxx [mailto:redhat-list-bounces@xxxxxxxxxx] On Behalf Of Yard, John Sent: Tuesday, September 15, 2009 10:52 AM To: General Red Hat Linux discussion list Subject: RE: RH 4 long halts while doing i/o stress test to san Yes], but there is conflicting information jyard -----Original Message----- From: redhat-list-bounces@xxxxxxxxxx [mailto:redhat-list-bounces@xxxxxxxxxx] On Behalf Of hike Sent: Tuesday, September 15, 2009 5:05 AM To: General Red Hat Linux discussion list Subject: Re: RH 4 long halts while doing i/o stress test to san our san vendor provides the tuning parameters. have you contacted the vendor for help? On Mon, Sep 14, 2009 at 6:04 PM, Yard, John <jyard@xxxxxxxxxxxx> wrote: > > On RH 4 I have a fiber multipath connection > to an emc san. > > If I do a stress test of i/o to the san - > an 8G cp from the san to the internal drive and > visa versa - I see halts of simple > montoring programs . The monitoring pgm > writes the date/time to a file and sleeps. > 30 seconds after cron starts the stress test > the monitor script will halt for 20 seconds, > then continue. > > RH support suggests this is a tuning issue. > There is not a lot of docs on 4.8 tuning parms, > is there any comments or suggestions where I > need to start > > JYard > UCLA > > -- > redhat-list mailing list > unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe > https://www.redhat.com/mailman/listinfo/redhat-list > -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
