IT22445: MEMORY LEAK IN FEDERATED FMP PROCESS DUE TO USE OF PASSTHRU.

Db2 Version 11.1 Mod 3 Fix Pack 3 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod3 Fix Pack3 iFix001 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod3 Fix Pack3 iFix002 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod 4 Fix Pack 6 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod 4 Fix Pack 5 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod 4 Fix Pack 7 for Linux, UNIX, and Windows

APAR status

• Closed as program error.

Error description

• The private memory leaks in the federated fenced process. The
  db2pd -memblock against the fenced routine shows the following
  blocks keep increasing.
  
  Memory blocks sorted by size:
  PoolID  PoolName  TotalSize(Bytes) TotalCount LOC   File
  0                 135996829        695021     5271  383163805
  
  Please note that the LOC can vary depending on the versions and
  fixpack level. Also, the File and LOC is the same as those od
  IT08324.
  
  The following statements illustrates how to produce the leak
  issue.
  
  $ db2 set passthru <fed_server_name>
  $ db2 "SELECT * FROM <table_in_source_db>"
  $ db2 set passthru reset
  

Local fix

• Please do not use passthru session if possible.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * ALL                                                          *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See Error Description                                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Upgrade to Db2 11.1 Mod 3 Fix Pack 3 or higher               *
  ****************************************************************
  

Problem conclusion

• First fixed in Db2 11.1 Mod 3 Fix Pack 3
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

  IT15466

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  DB2 FOR LUW

• Fixed component ID

  DB2FORLUW

Applicable component levels

• RB10 PSN

     UP