Linked by David Adams on Thu 20th Nov 2008 04:19 UTC
General Unix Linux and other Unix-like operating systems use the term "swap" to describe both the act of moving memory pages between RAM and disk. It is common to use a whole partition of a hard disk for swapping. However, with the 2.6 Linux kernel, swap files are just as fast as swap partitions. Now, many admins (both Windows and Linux/UNIX) follow an old rule of thumb that your swap partition should be twice the size of your main system RAM. Let us say I’ve 32GB RAM, should I set swap space to 64 GB? Is 64 GB of swap space really required? How big should your Linux / UNIX swap space be?
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RE: my theory
by bnolsen on Mon 24th Nov 2008 04:43 UTC in reply to "my theory"
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On my 8 core dev system I turned off swap entirely. Problem was when I would make a screw up which caused a memory overrun I ended up having to either hard reboot the machine or else wait 20+ mins for the application (along with a bunch of other apps) to get OOM killt. Without swap this OOM cycle runs faster. I'm sure the better way is to probably set some sort of hard per process real ram limit.

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