Diagnosing slow machines.

21 Nov

Check Top for high load and high IO.

If high iowait times, try running “iostat -c 1”, to see what the %iowait times are (should be <25??)

If you see high IOWait, can use the "fuser -vm /dev/sda1" to see what processes are using files on a filesystem.

Can use "mpstat -P ALL" for a summary of processor stats.

Do a "ps -el | grep ' D '" – these are processors waiting for IO.

vmstat – useful for looking at vm statistics

If network is slow, try mii-tool to check how fast your card is running

See: http://www-128.ibm.com/developerworks/aix/library/au-satslowsys.html

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