IT44577: High memory usage in amqrmppa process

APAR status

• Closed as program error.

Error description

• The memory consumed by amqrmppa process kept increasing since
  the process was started.
  
  The pmap output showed big allocation of heap memory for the
  affected amqrmppa process.
  
  12345:   /opt/mqm/bin/amqrmppa -m QMGRNAME
  Address           Kbytes     RSS   Dirty Mode  Mapping
  0000000000400000       4       4       0 r-x-- amqrmppa
  0000000000600000       4       4       4 r---- amqrmppa
  0000000000601000       4       4       4 rw--- amqrmppa
  0000000000a90000 15121636 15031040 15031040 rw---   [ anon ]
  ... ...
  00007fe938876000       4       0       0 -----   [ anon ]
  00007fe938877000     256      24      24 rw---   [ anon ]
  00007fe9388b7000       4       0       0 -----   [ anon ]
  00007fe9388b8000     256      60      60 rw---   [ anon ]
  00007fe9388f8000       4       0       0 -----   [ anon ]
  00007fe9388f9000     256      60      60 rw---   [ anon ]
  ... ...
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Users using MQ client applications often connecting and
  disconnecting in FASTPATH mode with connection authentication
  enabled
  
  
  Platforms affected:
  MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  A defect in managing the internal audit entries created for MQ
  process spawned for authentication caused increase in memory
  usage over a period of time.
  

Problem conclusion

• MQ code has been modified to correctly manage the internal audit
  entries to prevent the increase in memory usage.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v9.2 LTS   9.2.0.25
  v9.3 LTS   9.3.0.20
  v9.x CD    9.3.6
  
  The latest available maintenance can be obtained from
  'IBM MQ Recommended Fixes'
  https://www.ibm.com/support/pages/recommended-fixes-ibm-mq
  
  If the maintenance level is not yet available information on
  its planned availability can be found in 'IBM MQ
  Planned Maintenance Release Dates'
  https://ibm.biz/mqplannedmaintenance
  
  ---------------------------------------------------------------
  

Temporary fix

Comments

APAR Information

• 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

  MQ BASE V9.2

• Fixed component ID

  5724H7281

Applicable component levels