z/OS MVS Planning: Global Resource Serialization
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VSAM data sets

z/OS MVS Planning: Global Resource Serialization
SA23-1389-00

If you take no action, SYSVSAM data set serialization is global.

Do not place an entry for SYSVSAM in the SYSTEM inclusion RNL. Every SYSVSAM request that needs the SYSTEMS attribute already has it. (Placing an entry for SYSVSAM in the SYSTEM inclusion RNL can degrade performance.

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