> The following scenario: z13 2964-N30 401 (yes, the smallest CPU) and > ~1,5TB of memory. z/OS 1.13 with RSU at Oct-2015 (plus 2964DEVICE, AFAIK). > > D M=STOR causes weird effects. System freeze for a while. For 2GB LPAR > system behavior is normal, for ~64GB LPAR there is few-second freeze, > but for 1,1TB LPAR system freeze for approx half a minute, TSO sessions > are broken, the *$HASP9211 JES2 MAIN TASK NOT RUNNING is issued. HMC > monitor show 100% CPU utilization. > I found the following APAR: > http://www-01.ibm.com/support/docview.wss?uid=isg1II14147 > (note, it is almost 10 years old) > > IMHO such behavior is unacceptable even for testing activities. While I > can avoid (and RACF-protect) the command, I have no idea whether some > piece of software would issue the same service internally. > > Is it bug or feature? In other words, can I expect IBM will fix it?
For z/OS 2.2, there is APAR OA47706. PROBLEM SUMMARY: **************************************************************** * USERS AFFECTED: Users of the DISPLAY M=STORAGE system * * command at HBB77A0. * **************************************************************** * PROBLEM DESCRIPTION: Long command (MSGIEE174I) response time * * issuing the DISPLAY M=STORAGE command. * **************************************************************** * RECOMMENDATION: * **************************************************************** The DISPLAY M=STORAGE system command is inefficiently processed, resulting in long command response times. PROBLEM CONCLUSION: DISPLAY M=STORAGE processing is changed to more efficiently process the command. MODULES/MACROS: IAXGI IAXMH IAXM9 IAXU3 IAXXI IAXXM IAXXR IEEDMST1 APPLICABLE COMPONENT LEVEL/SU: R7A0 PSY UA78514 UP15/08/19 P F508 For lower releases, you may want to avoid issuing that command in a logical partition where you have a large amount of real storage but only one general purpose CPU online. Jim Mulder z/OS System Test IBM Corp. Poughkeepsie, NY ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
