High IO By Timestensubd process was observed with two TimesTen Servers with similar workload, how to diagnose the underlining problem? (Doc ID 1683522.1)

Last updated on FEBRUARY 27, 2016

Applies to:

Oracle TimesTen In-Memory Database - Version 11.2.2.4.10 and later
Information in this document applies to any platform.

Goal

How to diagnose what's underlining issue when high IO rate is observed between 2 TT servers with similar workload?

 

server with high IO from iotop:

Total DISK READ: 0.00 B/s | Total DISK WRITE: 5.30 M/s
 TID  PRIO  USER     DISK READ  DISK WRITE  SWAPIN     IO>    COMMAND
43204 be/4 <user>    0.00 B/s    4.64 M/s  0.00 % 43.25 % timestensubd -verbose -userlog /opt/logs/tterrors~a/logs/ttmesg.log -id 1000002 -facility user -showdate
1547 be/3 root        0.00 B/s    0.00 B/s  0.00 % 42.38 % [jbd2/sda3-8]

  
server without high IO from iotop:

Total DISK READ: 0.00 B/s | Total DISK WRITE: 5.89 M/s
 TID  PRIO  USER     DISK READ  DISK WRITE  SWAPIN     IO>    COMMAND
53620 be/4 <user>    0.00 B/s    5.11 M/s  0.00 %  0.40 % timestensubd -verbose -userlog /opt//logs/tterrors~a/logs/ttmesg.log -id 1000000 -facility user -showdate
1590 be/3 root        0.00 B/s    0.00 B/s  0.00 %  0.30 % [jbd2/sda3-8]

 

  

Solution

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