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CEEVGTSI CPU usage high (74-75%) in CICS TS

Question & Answer


Question

Why is the CPU usage so high in my CICS Transaction Server for z/OS (CICS TS) region? My STROBE reports shows module CEEVGTSI is using 74 to 75% of the CPU. CEEVGTSI is the Language Environment (LE) Stack Increment module.

Answer

The LE STORAGE runtime option was (00,NONE,00,0K). The 3rd STORAGE option for dsa_alloc_value of 00 requests the stack storage be cleared. Setting dsa_alloc_value to 00 is only recommended in a debug environment.

After updating the STORAGE option to (00,NONE,NONE,0k), STROBE reports now show CEEVGTSI using less than 1% CPU. Testing with (00,NONE,CLEAR,0K) shows only 2% CPU usage in CEEVGTSI.

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Product Synonym

CICS/TS CICSTS CICS TS CICS Transaction Server

Document Information

Modified date:
11 March 2016

UID

dwa1256539