I've updated Dell OMSA to version 8.3.0 on a Dell Poweredge R720, running Redhat 6.7 64bit.
The server has 512GB of RAM.
I noticed that after the OMSA packages were updated and services were restarted, the kernel buffers used by Linux to stage disk writes into cache, have dropped significantly. It looked that the cache buffers were flushed.
Now, this is not something that I would worry too much, that's how the Linux kernel works. I happened to noticed on this particular server because we are depending heavily on disk cache on this server for performance reasons.
Does anybody know if restarting Dell OMSA services will also trigger a drop of disk cache buffers ?