We have 2 Rs6000 S-85
Each initially had/have 6 processors and 8 GIG of RAM each
Node 1 we added 14 processors and 32 GIG of RAM On May 19. (11 days ago)
My memory utilization reporting for node 1 showed a spike in available memory 25-30GB for May 19 to 25 . I kind of expected this because I did not think the app would try to take any more memory. Then suddenly since the 26th, available Real memory took a sudden drop down to 2 GB!

Virtual memory up until the 26th was hovering around 80% since then and now it is at 99%.

Application on the node is is Health care System called Cerner. It also Runs MQ Series Middleware.

It is almost like the system realized it had the memory to use Saturday morning and has since then decided to use it!

I have not yet added paging space for this memory, if it is needed. I need to look into that. I believe there is an economy of scale or breaking point for paging. Currently paging space is at 8192MB currently.

The memory and CPU we added were a total surprise. Our vender may not have known what they sent us. We thought we were getting 4 more CPU and anothe 8 GIG of RAM. Instead we got 14 CPU and 32GIG of RAM! Christmas in May!

We are going to give node 2 the same treatment for memory and CPU (which strictly runs a 300 GB Oracle database)

I am just not sure what to make of node 1 behaviour.
Any comments are appreciated. SkyyBugg