We had z/OS 1.13 HSM abend S878-10 at 1am Monday. IBM tracked down an open APAR. It allocates a small amount of space for each volser during migration. Forgets to free the memory, and eventually chews up all private memory below the 24 bit line in SYSHSM*. It was opened in Sept, Should be out by the end of the year.
Local fix is to bound HSM periodically (weekly/monthly). We were up on a busy LPAR for 2 months before it crashed. On Wed, Oct 17, 2012 at 5:02 PM, Munish Sharma <[email protected]> wrote: > We had an issue on one system wherein hsm cds backups were failing on LPAR1 > with RC=12 and REAS=08. The jrnl backups were going fine. > > When browsing through the activity logs, I came across the following: > > ADR376E (ttt)-mmmmm(yy), UNABLE TO ACQUIRE ADDITIONAL STORAGE FOR THE TASK > > Since dfdss tries a concurrent backup of all 3 cds' to tape, I think it is > facing a memory issue. But since journal is not included in this concurrency, > it always goes fine. Also, situation is compounded for hsm since mcds is > multi-cluster. So it requires the more memory. > > But the backup on LPAR2 was running fine. So I think it comes down to the > region size on both tasks. LPAR1 has 8M but LPAR2 has 0M. Therefore I guess > LPAR2 has the capability to scale up the region size required by dfdss. > > Shall we try modifying the REGION parm for LPAR1 and test the backvolcds > command > > OR As earlier suggested the << Use the DSSXMMODE(?) SETSYS parm to run DSS in > its own cross-memory address space>> ..clearly in this case as well... It's > happening as too many DFDSS tasks are running in HSM., to backup the multiple > CDS's > > Regards > Munish Sharma > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN -- Mike A Schwab, Springfield IL USA Where do Forest Rangers go to get away from it all? ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
