Poor Disk Performance
Brendan Gregg
MAY 8, 2021
Hit Ctrl-C to end. Hit Ctrl-C to end. The read size is large (128 Kbyte average as seen in iostat(1)), but that's not excessive. biolatency (this is my BPF tool from [bcc]), printing 60-second histograms, per disk (-D): # biolatency -D 60 1. Tracing block device I/O.
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