search for: vmtune

Hello, I am running SAMBA 2.0.7.0 on AIX 4.3.3.0 I have a 1 Tera Byte filesystem on AIX made available to NT and MAC. There is heavy IO activity on this filesystem and all of a sudden the NT's and MAC's can't read or write any file on this shared filesystem. Also AIX is running out of memory whenever this happens and files cannot be copied onto the said filesystem even at unix

...l, I knew I was doing some serious work, but I always seemed to have a fair amount of cpu wait. So I read *many* pages on the IBM site about tuning the VMM and none seemed to help until after some PMR's with IBM and some personal investigation. By defeating the read ahead mechanism with "vmtune -r 0", our throughput has gone through the roof! Now the only thing we see is Kernel and User time no Wait at all! And the disks have been happier than ever. As I see it, we were agressively caching things that may be bumped out of memory before we ask for it since there are 550 WS's aski...