Memory Utilization under Linux and OEM
Date: Thu, 17 Feb 2011 12:36:54 -0300
Now... I know I'm missing something trivial here... I hope...
I have a four node RAC, each node with 62G of memory. DB is 220.127.116.11
I have all four instances configured with 36G SGA and 8G PGA. (this adds to 44G and about 70% of the server memory)
Now, I also have an OEMGC Agent and of course the CRS and ASM running.+
OEM is 10.2.0.5 with PSU3.
OS tools (free) shows that I have about 13G of free memory, which means that I have about 80% memory usage. Now, so far so good, this is what I expected.
$ free -g
total used free shared buffers cached Mem: 62 61 1 0 1 10 -/+ buffers/cache: 49 13 Swap: 31 0 31
Now... OEM says that Memory Utilization (%) is about 25% for each host for the last 31 days.
Am I wrong in assuming that Memory Utilization (%) is the % of memory used? shouldn't that be more around 80%? is OEM looking somewhere else? (actual utilization within the database as opposed to allocation)
It would actually be more consistent if Memory Utilization (%) was the free memory %... :-P
Thanks in advance