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Increased iostat %util disk utilization on Standby DB after updating OL7.9 kernel from UEK4 to UEK6

edited Feb 23, 2022 10:33PM in Linux Operating System (MOSC) 4 commentsAnswered

After updating Oracle Linux 7.9 from kernel version 4.1.12-124.46.4.1.el7uek.x86_64 to kernel version 5.4.17-2136.304.4.1.el7uek.x86_64,

we observe a significant increase in % of disk utilization on the standby base.

The oracle 12c standby/primary database configuration has not changed.

The current version of the database is Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production

iostat-x metrics before kernel update (primary db)

Linux 4.1.12-124.46.4.1.el7uek.x86_64 (twodb2)  21.02.2022 _x86_64
avg-cpu: %user  %nice %system %iowait %steal  %idle
         16,71   0,03   6,08   0,50   0,00  76,68

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              1,53    2,07 239,68 246,24 21204,53 3360,93  101,11    0,10   0,21   0,30   0,12  0,17  8,46
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