Re: OnConfig parameters tuning

"Laverio" <laverioNO@z-1000.net> wrote in message news:cac7sg$e8v$1@newsreader.mailgate.org... > Hi guys, I'm trying to speed up an IDS 9.30 on a Sun 7.5 system w/ 2Gb ram > and 4 processors that seems very slow on a large sequential write (I suppose > that the problem resides in the dbspaces on filesystem...). Any suggestion? Can you post the service times and queues you're getting from the relevant disks using, say, vmstat or sar? > My onconfig it's set as follow: > RESIDENT 0 # Forced residency flag (Yes = 1, No = 0) Set to 1. (I *think* this is good on Solaris ....) > NOAGE 0 # Process aging Ditto. > # Shared Memory Parameters > NUMAIOVPS # Number of IO vps You imply you're using cooked files, so no kaio. In this case you should set this parameter equal to the number of physical disks that contain chunks, plus some. > CLEANERS 1 # Number of buffer cleaner processes Have this to 8, or the number of physical disks, whichever is the higher. > SHMVIRTSIZE 8000 # initial virtual shared memory segmentsize Ugh! What does onstat -g seg show? > LRU_MAX_DIRTY 60 # LRU percent dirty begin cleaning limit > LRU_MIN_DIRTY 50 # LRU percent dirty end cleaning limit You could reduce thse to, say, 10 and 5 or lower.

Captain Pedantic wrote: > "Laverio" <laverioNO@z-1000.net> wrote in message > news:cac7sg$e8v$1@newsreader.mailgate.org... >> Hi guys, I'm trying to speed up an IDS 9.30 on a Sun 7.5 system w/ >> 2Gb ram and 4 processors that seems very slow on a large sequential >> write (I suppose that the problem resides in the dbspaces on >> filesystem...). Any suggestion? > > Can you post the service times and queues you're getting from the > relevant disks using, say, vmstat or sar? > >> My onconfig it's set as follow: >> RESIDENT 0 # Forced residency flag (Yes = 1, No >> = 0)> > Set to 1. (I *think* this is good on Solaris ....) > >> NOAGE 0 # Process aging But reduce NUMCPUVPS to 3 or you'll probably discover the machine is crippled for other reasons. Sorry, gotta go now, but i'll try to throw in a bunch more ideas on tuesday (monday is a public holiday for us here in australia. God Save the Queen. I knew there had to be a good reason to retain the monarchy.)