Allocating additional SMF buffers

When you invoke a trace, ensure that you allocate adequate SMF buffers. Specify SMF buffering on the VSAM BUFSP parameter of the access method services DEFINE CLUSTER statement. Specify CISZ(4096) and BUFSP(81920) on the DEFINE CLUSTER statement for each SMF VSAM data set.

If an SMF buffer shortage occurs, SMF rejects any trace records sent to it. WebSphere MQ sends a CSQW133I message to the z/OS console when this occurs. WebSphere MQ treats the error as temporary and remains active even though SMF data could be lost. When the shortage has been alleviated and trace recording has resumed, WebSphere MQ sends a CSQW123I message to the z/OS console.