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A comment on MySQL performance optimization: 50% more work with 60% less latency variance.
Thread discussing the bug and a test program to show the issue.
https://lkml.org/lkml/2012/10/9/210
Patch introducing the bug:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux....
Patch fixing the bug:
It causes a huge dropoff in latency and throughput by causing all filesystems to block even when they don't need to.
In short, 3.2 is lethally bad in terms of database workloads.
There are no comments on this comment yet.
Thread discussing the bug and a test program to show the issue.
https://lkml.org/lkml/2012/10/9/210
Patch introducing the bug:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux....
Patch fixing the bug:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux....
It causes a huge dropoff in latency and throughput by causing all filesystems to block even when they don't need to.
In short, 3.2 is lethally bad in terms of database workloads.