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Linux server slow. Why?

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linux-howto

http://www.linuxforums.org – I have been getting requests from application teams that the server is running slow. I have checked the memory utilization, processes running and cpu utilization. Please find below: #free -m total used free shared buffers cached Mem: 3006 2994 11 0 6 171 -/+ buffers/cache: 2817 189 Swap: 12291 1123 11168 # Processes running and cpu utilization are OK. # df -h Filesystem Size Used Avail Use% Mounted on /dev/hda5 9.7G 2.6G 6.7G 28% / /dev/hda6 3.0G 69M 2.7G 3% /tmp /dev/hda2 68G 34G 31G 53% /u01 /dev/hda1 99M 12M 83M 13% /boot tmpfs 1.5G 0 1.5G 0% /dev/shm # Though most of the memory (RAM) utilized and just 11MB left for free, there is still HUGE swap space available. Will that not help with respect to memory? Why is the server running slow? Please let me know what are the other parameters to check and judge the server slowness. How to make it fast and comfortable server? (HowTos)