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semisane
2016 Feb 03
6
Measuring memory bandwidth utilization
I'd like to know what the cause of a particular DB server's slowdown might be.
We've ruled out IOPs for the disks (~ 20%) and raw CPU load (top shows perhaps
1/2 of cores busy, but the system slows to a crawl.
We're suspecting that we're simply running out of memory bandwidth but have no
way to confirm this suspicion. Is there a way to test for this? Think: iostat
but for