Archive for the ‘linux’ Category
Thursday, January 10th, 2008
When you have a performance concern, check the operating system settings to determine if these settings are appropriate for your application. Because the Linux operating system is not a WebSphere Application Server product, be aware that it can change and results can vary.
Procedure
Configure the following settings and variables according to ...
Posted in app server tuning, hardware setup, linux, file systems, websphere 6.0.x | No Comments »
Monday, October 1st, 2007
Commands below are for Linux, but the idea works everywhere 'sadc' is available.
1) Start
/usr/lib/sa/sadc
Example
machine1:~ # /usr/lib/sa/sadc 2 7200 sadc.outfile
this logs SAR data for 4 hours.
2) Stop logging, do
'killall sadc' or 'kill'
3) Usage of sar. Creating report with all options
sar -A -f
Example
machine1:~ # sar -A -f sadc.outfile > sar.outfile
machine1:~ # cat ...
Posted in performance monitoring, automation, linux | No Comments »
Monday, October 1st, 2007
Sometimes it is easier and quick to get status on a Web Server from a browser - you can be anywhere and know what is going on with the server. Of course, this works only if you are on a firewall protected network.
The IBM HTTP Server server-status page is available ...
Posted in Web server tuning, aix, linux, solaris, ibm http server, apache | No Comments »
Thursday, June 14th, 2007
Sometimes you want to preserve only a directory structure into a tar ball without having to archive the files themselves. This can happen if you want to backup a pre-defined directory structure, run some tests, and do not really care about the files created during the test. You ...
Posted in system admin, aix, linux | No Comments »