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12532 - MTXW Status and Job QGYSERVER

12532 - MTXW Status and Job QGYSERVER

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MTXW Status and Job QGYSERVER

Hello everyone,

After we upgraded OS/400 from V4R5 to V5R2 with CumPack 3252, DB Fix 10, and
other individual PTFs and upgraded SAP kernel to 1617, we noticed that the
dialog work processes are in MTXW status more frequently than ever. From F1 help
(The initial thread of the job is in a mutex wait. A mutex is a synchronization
function that is used to allow multiple jobs or processes to serialize their
access to shared data.) it looks like a locking wait. But why?

Also we are getting jobs QGYSERVER under the subsystem R3_XX. We used to get
those jobs when we are applying the support packages with user activities on the
system, and they went away days after the support packages were finished. But
now (10 days after the last time we applied the support packages) there are
still about 20 QGYSERVER jobs in DEQW status which entered the system about 1 or
2 hours after midnight in the last a few days.

Meanwhile we found and fixed a few slow transactions like MB52. But more
transactions, for instance V/LD, VK34, and MM17, shows performance issues. Does
anyone have similar experiences with them?

Any help or hint is appreciated!

Thank you very much,
Victor
SAP Basis Manager
Plastipak Packaging INC

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