Benchmarking Cold Start on SLES 10
Posted on May 7, 2007
Filed Under Linux, Programming
Yesterday I began benchmarking an application’s cold start (after reboot) performance on SLES 10, and ran into an interesting problem. The results of my tests were varying wildly from between 2 to 3 seconds start-up time and 10-14MB of memory usage. After doing some investigating I found that the “zmd” process (zmd /usr/lib/zmd/zmd.exe) was getting kicked off at init time and eating a bunch of my CPU (10-50%) during my tests. I subsequently disabled zmd via “chkconfig –level 345 novell-zmd off”, rebooted and life was good. The memory used on the box post start-up went from 107MB to 98MB and the machine was quiet after the init sequence finished . Most importantly; however, I am now able to get repeatable results.
As an aside, I realize that disabling the Zen Network Manager impairs my ability to update and add software to my system but that begs the question, do I really need to be automatically notified of updates on my server machine? For me, the answer is no. Also, one wonders why Novell chose to write zmd in C#, an “exe” process running on my Linux box??
Comments
Leave a Reply