Friday, August 5, 2011

what is loadaverage

It is the average number of processes waiting in queue to be executed by the CPU over the specified period of time.

First off, there are three load averages. From left to right there is, 1 minute load average, 5 minutes load average and 15 minutes load average.

Different Top commands

1. Top : to see the load

2. IfTop : This one will help you know who currently uses the bandwidth of your server. You will see the IP address and hostname of the other party as well as the data transfer rates in and out of these connections. Finally, at the bottom you have peaks, current rates and cummulative data transfers, in and out, and with the 1, 5 and 15 minutes averages…

3. MyTop : This one is fairly simple. It show top SQL requests made to the MySQL server, what the request is exacly (INSERT, UPDATE, DELETE, etc.), who is the user making the request, on which database and for how much time (in seconds) the query has been running.

4. This last one is simply to monitor the number of requests made to Apache, the quantity of data processed by Apache, the files currently being downloaded and such. Once again, it is a great tool to monitor live stats about your apache server.

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