Re: Dirty LRU exceeding the LRU_MAX of 2%

Andrew Lawrenson wrote : >>Here is what I am seeing. In onstat -R the dirty q's are over 2% dirty. >>onstat -F shows all the flushers as Idle.>> >>I know I have seen this in the post but cannot find it in search. >> >>Attached. >>onstat -R output >>onstat -F output>>onconfig output >>IDS 7.30.UC6 >>AIX 4.3.2 >>4CPU >>512MB >> > > >There's a bug in certain versions of online that may be affecting you - >Defect 115741, whereby the wakeup code for the page cleaners doesn't work >and the dirty queues grow beyond LRU_MAX_DIRTY. It certainly affected me in >the NT ver 7.30 (the bug does also affect unix) - we had checkpoints of up >to 2 minutes, where they should have been 1-2 seconds. Upgrading to 7.31 >fixed it for me. Does this bug have any general affect on the disk i/o wait, because vmstat reports idle at 0 wa at 90+ and I am not using raid5 (raid1). We upgraded our AIX F50 4.1.4, 2 cpu's, 1GB memory, 1 SSA disc adapters to AIX H70 4.3.2, 4 cpu's, 1GB memory, 2 SSA disc adapters. It didn't help at all. Any one who has had the same problem with AIX and i/o-wait and got it solved ?? Bjarne W. Jensen > > Andrew Lawrenson >