OCI: IO Performance Issue Occurs when IO Throughput Hits the Max Throughput Limits (Doc ID 2526247.1)

Last updated on MAY 11, 2020

Applies to:

Symptoms

iostat reports IO throughput problems with %util up to 100%

zzz ***Sat Mar 23 10:05:11 EDT 2019
avg-cpu: %user %nice %system %iowait %steal %idle
13.32 0.00 0.98 1.59 0.00 84.11

Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await r_await w_await svctm %util
sdd 1.00 0.00 373.00 0.00 334440.00 0.00 1793.24 57.15 155.43 155.43 0.00 2.68 100.00
dm-2 0.00 0.00 365.00 0.00 327536.00 0.00 1794.72 57.28 159.20 159.20 0.00 2.74 100.00

Cause

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