New answers tagged performance-monitoring
An old question for sure, but answered here: http://serverfault.com/a/579180 The value of this counter is the number of milliseconds that the most recent request spent waiting in the global queue. This does not include any time the request spent waiting in the application queues. The threshold for this counter is 1,000.
iotop - it will help you identify process and then you can use lsof -c <process> to list all opened file descriptors opened by process. Or you can strace process to see all current low level syscalls. These utilities are not for monitoring, they are for real time investigation. You will need to implement proper monitoring, if you need to see also some ...
Kevin mentions a number of great points, but it might help to start the analysis at a little higher level: what are the two machines and, since we're talking about Tomcat which runs in a JVM, do both have zAAPs or zIIPs (assuming zAAP on zIIP)? From the "d m=cpu" you should be able to get the machine model information which will at least let you know if you'...
The following script computes the CPU time (in hours) per user (for all users in /etc/passwd file) in the last month: #!/bin/sh bmonth=$(/bin/date +%m) bmonth=$(($bmonth - 1)) year=$(/bin/date +%y) if [ $bmonth -eq 0 ];then bmonth=12 year=$((year-1)) fi if [ $bmonth -lt 10 ];then bmonth=0$bmonth fi emonth=$(/bin/date +%m) hour=00 minute=00 ...
I have just realised you can check how much memory a user has used with qacct -j -o <username>
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