A fix is available
APAR status
Closed as new function.
Error description
Customers may need to increase the internal TCP/IP buffer sizes in order to improve network performance on high latency networks. There is no way to do this on z/OS today without changing the defaults for the entire TCP/IP stack. . Note: PI10617 will allow 2MB TCP/IP send and receive buffer sizes to be set for z/OS 2.1 (and above). Activation instructions must be obtained from the support center. . Note: PI24980 will prevent the service parameter for this APAR from causing smaller buffers than the defaults defined in TCP/IP. . Additional keywords: SETSOCKOPT send receive buffer TCP/IP TCPIP channel performance slow QREP InfoSphere Replication Server
Local fix
Change the default send/receive buffer sizes for the whole TCP/IP stack.
Problem summary
**************************************************************** * USERS AFFECTED: All users of WebSphere MQ for z/OS * * Version 7 Release 0 Modification 1 and * * Release 1 Modification 0. * **************************************************************** * PROBLEM DESCRIPTION: WebSphere MQ does not allow default * * TCP/IP send and receive buffer sizes to * * to be overridden. * **************************************************************** * RECOMMENDATION: * **************************************************************** Customers who wish to use larger TCP/IP send or receive buffers must currently do so by changing the stack-wide defaults in TCP/IP itself. This APAR provides a basic switch to allow MQ to use larger buffers without configuring them at the stack level.
Problem conclusion
Temporary fix
Comments
Applying the PTF for this APAR will not enable this function. It should only be used under direction from IBM Support. Please contact IBM Support if you are interested in using this capability.
APAR Information
APAR number
PM71966
Reported component name
WMQ Z/OS V7
Reported component ID
5655R3600
Reported release
010
Status
CLOSED UR1
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2012-08-31
Closed date
2013-02-18
Last modified date
2015-09-04
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UK91754 UK91755
Modules/Macros
CSQXCCIT CSQXCLIT
Fix information
Fixed component name
WMQ Z/OS V7
Fixed component ID
5655R3600
Applicable component levels
Fix is available
Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.
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Document Information
Modified date:
04 September 2015