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I hate the invention of "burstable" RAM on VPSes for this reason. Eventually your IO cache grows until it has most of your guaranteed RAM. Now every new proce
by FlyingAvatar 13y ago
I hate the invention of "burstable" RAM on VPSes for this reason. Eventually your IO cache grows until it has most of your guaranteed RAM. Now every new process is playing a game of Russian roulette with your hypervisor to see if it can actually allocate into your "burstable" RAM what the kernel is reporting is freely available.
- vajrabum 13y agoActually this is a general issue when running multiple Linux VMs under a hypervisor. In that case you don't want them filling up RAM with prefetch data from disk because that's likely to cause contention and reduce page sharing between VMs.