Re: NOTRANS processes and hosed up disks.

In article <CL8MME.845@alert.com> ewh@alert.com writes: >Problem: During periods of heavy activity, processes in a NOTRANS >state will hang-around for minutes before exiting. When this happens >the number of NOTRANS processes creeps up to a some arbitrary value >then severly drops to a low value almost instantly. The higher the >value gets, the slower the system gets. Its like they are being >blocked by something. During the last incident I also noticed that a >particular disk was being hit at 100% capacity (iostat out: %tm_acct >was at 100%), and that this disk contained a portion of rootdbs. Try running a tbstat during the period of heavy activity, to see if a checkpoint is in progress. That could cause a lot of i/o as you are seeing. If that is the case, you should look to adjusting the parameters LRU_MAX_DIRTY and LRU_MIN_DIRTY (lower the values). Also adjust CLEANERS to be equal to your LRUS value. Dave -- Disclaimer: These opinions are not those of Informix Software, Inc. ************************************************************************** "I look back with some satisfaction on what an idiot I was when I was 25, but when I do that, I'm assuming I'm no longer an idiot." - Andy Rooney