A fix is available
APAR status
Closed as program error.
Error description
Changing rtentry_lock_complex in some cases will shift the lock contention to anoter place in the networking code. In some cases this may reduce network throughput and improver in others.
Local fix
Problem summary
Customer migrated their Oracle ERP from Power6 + AIX 5.3 to Power 7+ AIX 7.1. After that, the response time was delayed. Customer observes high system CPU usage is due to heavy lock contention. About 5.61% cpu is utilized to acquire drw write lock.
Problem conclusion
Code is modified to take write lock only when route expire value is getting modified. While reading, read lock is held. This change avoids the lock contention
Temporary fix
Comments
APAR Information
APAR number
IV49678
Reported component name
AIX 610 STD EDI
Reported component ID
5765G6200
Reported release
610
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Submitted date
2013-09-19
Closed date
2013-09-19
Last modified date
2014-02-17
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
AIX 610 STD EDI
Fixed component ID
5765G6200
Applicable component levels
R610 PSY U859536
UP14/02/17 I 1000
PTF to Fileset Mapping
U859536 bos.mp64 6.1.8.17
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Document Information
Modified date:
17 February 2014