lrud process slowing down the system

[arvibm]

Hi,

I am facing performance problem with one of our servers.I observed the server goes slow down the moment lrud process gets initiated. lrud process cpu usage in topas output is around 25% and hdisk 0 and hdisk 1(internal disks) gets 100 % utilized. None of the user will be able to connect to server the time lrud process gets initiated. After some time the server starts working perfectly normal and repeats the slowdown behaviour after a interval of around 20-30 minutes.I have changed the following vmtune parameters around one month back.The time lrud process gets initiated i am unable to connect to server from any new session.

#vmtune parameters
/usr/samples/kernel/vmtune -p 5 -P 10 -s 1 -R 32 -f 480 -F 512
/usr/samples/kernel/vmtune -b 200 -B 800

why this lrud process gets initiated on server?why the process slow down the system.


Regards

arvibm

 

[bi]

It may have to do with having 200 people hitting the database through the network.

 

[sbix]

I have some experience in system with a very few RAM, MTS has been a solution also without 200 concurrent users ... but only 20 or 30

 

[arvibm]

Hi,

I have collected the perfpmr data of server during slowdown behaviour and send to IBM for analysis.finally they have give me solution to go for more memory.They have traced out the process demands 5.81 GB of memory at the time of slowdown.

Thanx for all the helpful tips and suggestions.

regards

arvibm

 

[gileb]

Hi,

This is quite an interesting thread. Do you have more details on how, we users, could pull such statistics ?