Posts Tagged ‘sar’

System performance analytics seems to be a frequent question on forums and mailing lists. Finding out why something is slow is generally nontrivial as there are many factors to consider. I have found the sysstat package to be an invaluable tool when looking at system performance. Specifically the command sar gives a wealth of information. (more…)

Text processing is fun. Well, fun if you like to beat your head against a wall. Most of the time I just string a few things together to get whatever I am doing done. Its much better to find the shortest way to do something, it spawns less processes, is more efficient and generally a good idea. So if you have ever wanted to match a string from some given output and only print the preceding line here you go. (more…)