http://www.cyberciti.biz/tips This is a Linux sys admin journal by Vivek about sys admin work, Linux tips & tricks, hacks, news and more. Fri, 03 Feb 2012 22:45:35 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 http://www.cyberciti.biz/tips/identifying-linux-bottlenecks-sar-graphs-with-ksar.html http://www.cyberciti.biz/tips/identifying-linux-bottlenecks-sar-graphs-with-ksar.html#comments Tue, 15 Dec 2009 06:33:21 +0000 Vivek Gite http://www.cyberciti.biz/tips/?p=6165 The sar command collect, report, or save UNIX / Linux system activity information. It will save selected counters in the operating system to the /var/log/sa/sadd file. From the collected data, you get lots of information about your server:

1. CPU utilization
2. Memory paging and its utilization
3. Network I/O, and transfer statistics
4. Process creation activity
5. All block devices activity
6. Interrupts/sec etc.

sar output can be used for identifying server bottlenecks. However, analyzing information provided by sar can be difficult, so use kSar, which can take sar output and plot a nice easy to understand graph over period of time. ]]> http://www.cyberciti.biz/tips/identifying-linux-bottlenecks-sar-graphs-with-ksar.html/feed 21 http://www.cyberciti.biz/tips/how-do-i-find-out-linux-cpu-utilization.html http://www.cyberciti.biz/tips/how-do-i-find-out-linux-cpu-utilization.html#comments Thu, 06 Apr 2006 17:25:00 +0000 Vivek Gite http://www.cyberciti.biz/tips/how-do-i-find-out-linux-cpu-utilization.html Whenever a Linux system CPU is occupied by a process, it is unavailable for processing other requests. Rest of pending requests must wait till CPU is free. This becomes a bottleneck in the system. Following command will help you to identify CPU utilization, so that you can troubleshoot CPU related performance problems.]]> http://www.cyberciti.biz/tips/how-do-i-find-out-linux-cpu-utilization.html/feed 125