#vmstat

Resolved: How would you interpret the following vmstat output? #dev #it #computers

How would you interpret the following vmstat output?

Consider the following five machines (named c, h, j, s and u) and their respective vmstat 1 outputs.

Given the information from the vmstat output:

Which machines would you consider being in a good shape? Why? What’s your reasoning?

Which machines would you consider being in a bad shape? Why? What’s your reasoning? How would you go about fixing…

Answer: Performance Tuning a High-Load Apache Server #answer #computers #development

Performance Tuning a High-Load Apache Server

I am looking to understand some server performance problems I am seeing with a (for us) heavily loaded web server. The environment is as follows:

Debian Lenny (all stable packages + patched to security updates)

Apache 2.2.9

PHP 5.2.6

Amazon EC2 large instance

The behavior we’re seeing is that the web typically feels responsive, but with a slight delay…

Solution: Performance Tuning a High-Load Apache Server #programming #it #fix

Performance Tuning a High-Load Apache Server

I am looking to understand some server performance problems I am seeing with a (for us) heavily loaded web server. The environment is as follows:

Debian Lenny (all stable packages + patched to security updates)

Apache 2.2.9

PHP 5.2.6

Amazon EC2 large instance

The behavior we’re seeing is that the web typically feels responsive, but with a slight delay…

How to: How to get % memory usage with vmstat? #solution #development #it

How to get % memory usage with vmstat?

I need to get a memory usage in % from vmstat, but I don’t quite understand some of the numbers relating to memory displayed in vmstat.

In particular, given an output like this

procs -memory -swap -io system -cpu r b swpd free buff cache si so bi bo in cs us sy id wa st 1 0 139728 45396 199128 1236360 1 2 4 622 3 1 51 4 43 2 0

What is the amount of total…

http://www.thegeekstuff.com/2011/03/sar-examples/

http://linuxhostingsupport.net/blog/tag/list-high-cpu-usage-processes

Uzun süredir çalışmadığı halde hafızada yer tutan işlemlerin hafızadan silinmesi:

vmstat -s komutuyla inactive olmuş olan processlerin hafızada ne kadar yer kapladığını görebilirsiniz.

Eğer bu benim başıma geldiği gibi GB'ları geçmiş ise aşağıdaki komut dizisiyle bu processleri hafızadan silebilirsiniz.