A question we see over and over again is
Why is
umountso slow? Why does it take so long?
Part of the answer was already given in an earlier blog post; here’s some more explanation. Continue reading
“umount is too slow”
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Category Archives: kernel
“read-balancing” with 8.4.1+
DRBD 8.4.1 introduces a new feature: read-balancing, which is configured in the disk section of the configuration file(s). This feature enables DRBD to balance read requests between the Primary/Secondary nodes. Continue reading
Make the kernel start write-out earlier
Similar to the recent post about setting the vm.min_free_kbytes value there’s another sysctl that might improve the behaviour: the dirty ratio. Continue reading
Increase vm.min_free_kbytes for better OOM resistance
Depending 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! Continue reading