Re: Processor Affinity

At 08:52 AM 2/5/97 -0500, Steve Romankiw wrote: >Our Sun 4000 server supports processor affinity. Because Sun supports >this option, I have configured our On-Line instance to recognize this >option. Our present user count is low, roughly 50 concurrent users. >Beginning next week, we will be jumping to over 300 concurrent users. > >In your environments, have you seen and +'s or -'s related to using >processor affinity? > >Below are setting taken from my onconfig: ># ># Our Sun server has four processors ># >MULTIPROCESSOR 1 # 0 for single-processor, 1 for>multi-processor >NUMCPUVPS 3 # Number of user (cpu) vps >SINGLE_CPU_VP 0 # If non-zero, limit number of cpu vps>to one > >NOAGE 0 # Process aging >AFF_SPROC 1 # Affinity start processor >AFF_NPROCS 3 # Affinity number of processors Processor affinity has been available for Sequent, since the early/initial DSA (7.x) ports. I have had some very strange behaviour issues using in some of the early versions. However some recent testing of an OLTP application under more recent versions (7.20), have showed some promising performance improvements. Proceed with caution though, you can easily shoot yourself in the foot. Review carefully what your server is running/doing, and CPU utilitization and load. Jon ---------------------------------------------------------------------------- --- Jon C. Vemo "Life is like a dogsled team, if you ain't the jvemo@cyberspace.com lead dog the scenery never changes." ---------------------------------------------------------------------------- ---