Curious to learn if anyone else has experienced this problem and what you did to resolve it. Migrating from z/OS 1.9 to 1.10. z/OS 1.10 exploits more 64-bit storage (GRS, SMSPDSE, TRACE, etc). The system trace (TRACE) buffers not only increased from 256K to 1M per logical CP, but also moved above the 2GB bar. We are experiencing very poor performance mostly during abend processing as described in II14465. Configuration: LPAR has 4GB real storage. 2 logical CPs In addition to z/OS, significant exploiters of 64-bit storage are: Four DB2 v8/v9 systems Three IMS v10 systems Four CICS Transaction Server v3.2 regions Two Java 1.6 (64-bit) application address spaces Regards, Jack Oakley
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