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DRBD resources need different monitor intervals
/0 Comments/in News, Tech-Blog /by flipAs briefly mentioned in Pacemaker Explained, DRBD devices need two different values set for their monitor intervals: primitive pacemaker-resource-name ocf:linbit:drbd \ params drbd_resource=”drbd-resource” \ op monitor interval=”61s” role=”Slave” \ op monitor interval=”59s” role=”Master” The reason is that Pacemaker distinguishes monitor operations by their resource and their interval – but not by their role. So, if […]
Increase vm.min_free_kbytes for better OOM resistance
/0 Comments/in News, Tech-Blog /by flipDepending on your setup and your workload (eg. within a virtual machine with little memory and much I/O) you could get into the situation that the kernel has little memory left, so wants to write some dirty pages to disk, but cannot, because for that it would need some memory free!