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Swap activity grows untill disk/system performance degrades ?

Hi,

I have very serious performance problem. My system:

AIX 5300-05

DB2 8.1 fixpack 14

SAP R/3 Enterprise 620 level 0060

RAM 32 Gb

Swap size 25 Gb

DB size 200 Gb

users 300

For examle let me say that I restarted my system. Users begin to connect and do their work. Performance is good. Slowly but constantly swap activity begins to grow (I used iostat command to monitor rootvg native disks where swap partition is) and after about 3 hours, disk activity reaches 100% and never goes down. In this state system is terribly slow and all users complain a lot. I understand that this is complicated situation but maybe someone experienced similar things before ?

At least where should I start ?

thank you in advance

Vilius

Former Member
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