Greetings, As part of our linux proof-of-concept project we built a new instance of the servers which provide our big student services application. The application runs on Oracle Web Application Server. The zlinux instance is running pretty much alone on a z/800 ifl and has oodles of real memory. The application only accepts work from 7am to midnight; the rest of the time it responds to any queries by putting up a page listing the hours of availablity.
The linux userid running the application was using about 3-4% of the cpu. The day we added our instance to the (external) load balancer its base cpu consumption went to 18% of the ifl, even during application downtime. It does seem to be able to do its share of the work by using an additional 15% of the cpu when the application is open, but we are puzzled that the polls by the load balancer seem to eat so much of a z/800 ifl. The participating standalone (Dell) boxes get polled too but run at <1% during downtime. Our IBM business partner is helping us investigate, but I thought I'd ask this forum of experienced users if you've seen/conquered performance problems running behind load balancers, or have an opinion about how much work will fit on a z/800? I have been told that the load-balancer polls are an xchange of Hello/Server Hello packets on port 443 (not a full-blown SSL handshake) every 2 seconds. thanks, kate Kate Riggsby University of Tennessee ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
