RHEL6.x Tuning Virtual Memory

swappiness

    A value from 0 to 100 which controls the degree to which the system
swaps.A high value prioritizes system performance, aggressively swapping
processes out of physical memory when they are not active. A low value
prioritizes interactivity and avoids swapping processes out of physical
memory for as long as possible, which decreases response latency. The
default value is 60.
    A high swappiness value is not recommended for database workloads.
For example, for Oracle databases, Red Hat recommends a swappiness value
of 10.

    vm.swappiness=10

https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Performance_Tuning_Guide/s-memory-tunables.html

https://www.linkedin.com/groups/echo-3-proc-sys-vm-59573.S.5928598366660345856?trk=groups_guest_most_popular-0-b-ttl&goback=.gmp_59573

http://en.wikipedia.org/wiki/Swappiness

https://www.netroby.com/view.php?id=3687

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