Memory Upgrade

[toni osta]

Hi ,

I have upgraded the memory from 16GB to 32GB in a rx2660 server , i have changed the shmmax value to 32768000000 to reflect the change ,
but the application team tell me that after adding the memory , the system is more slower !!!
is there any other parameter i should change other than the shmmax ?

Thnak you

[Dennis Handly]

Why would you want to set shmmax to the size of memory? You need to reserve some for the buffer cache and other uses.

[SKR_1]

I dont think that you need to change shmmax value to take effect the memory change on the system.

Thanks

SKR

[yulianto piyut]

1. ask to DBA admin the size of shmmax and don't set the shmmax value to the total of physical memory

2. check the dbc kernel parameter and resize the value