Sockets may not get freed if an application is using the pollset APIs to poll on the sockets. This may cause the memory leak (i.e. memory usage slowly increasing) until the system becomes very sluggish or even hangs.
http://www.ibm.com/support/docview.wss?uid=isg1IZ17881
High Impact/Highly Pervasive APAR
APAR Number: IZ17881
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APAR status
Closed as program error.
Error description
Sockets may not get freed if an application is using the
pollset APIs to poll on the sockets. This may cause the
memory leak (i.e. memory usage slowly increasing) until
the system becomes very sluggish or even hangs. The problem
has been seen when running a DB2 v9.1 client.
Local fix
Problem summary
****************************************************************
* USERS AFFECTED:
* Users of AIX 6.1 with the bos.mp64 fileset below the leve of
* 6.1.0.5.
****************************************************************
* PROBLEM DESCRIPTION:
* Sockets may not get freed if an application is using the
* pollset APIs to poll on the sockets. This may cause the
* memory leak (i.e. memory usage slowly increasing) until
* the system becomes very sluggish or even hangs. The problem
* has been seen when running a DB2 v9.1 client.
****************************************************************
* RECOMMENDAION:
* Install APAR IZ17881.
****************************************************************
Problem conclusion
AIX kernel was fixed to correctly manage the socket
reference count along the pollset API paths such that the
sockets can be freed after they are closed. Freeing the
sockets ensures that the memory is returned to AIX and is
not leaked.
Temporary fix
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* HIPER *
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Comments
APAR information
APAR number IZ17881
Reported component name AIX 610
Reported component ID 5765G6200
Reported release 610
Status CLOSED PER
PE NoPE
HIPER YesHIPER
Submitted date 2008-03-15
Closed date 2008-03-15
Last modified date 2008-04-07
APAR is sysrouted FROM one or more of the following:
IZ17873
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name AIX 610
Fixed component ID 5765G6200
Applicable component levels
R610 PSY U816201 UP08/04/07 I 1000