6. Swap Management ( Real Time)

6. Swap management

Issue 1: the server went down or hangs.

A: go to console, check the error messages, and reboot

Issue 2: why the server slower down?

A:

1. # vmstat

It checks the page in & page out size.

Page in should be more size than page out.

If page out size is more, then it means page out didn’t release memory to swap.

Then

# ps –ef | grep 1255

If root

# kill -9 1255

# kill –HUP 1255 (HUP for refresh)

Note: In root mostly java or oracle process runs, so kill that.

Note : if other applications inform them

# top (or) # prstat –a

It shows max memory occupied application. Then submit/inform report to the desired applications. Mostly /oracle, /java applications

If it is ‘root’ issue then delete the old files & compress the unuse files

To display volume table of content (vtoc)

# prtvtoc /dev/rdsk/c0d0s2

To display only CPU utilization:

# prstat –s CPU –n 10