Pillar Axiom: Slammer Control Unit Recovery Succeeded on Axiom Releases below 03.03.25
(Doc ID 1475984.1)
Last updated on JULY 25, 2019
Applies to:Pillar Axiom 500 Storage System - Version Not Applicable to Not Applicable [Release N/A]
Pillar Axiom 600 Storage System - Version Not Applicable to Not Applicable [Release N/A]
Information in this document applies to any platform.
This specific issue only affects Ax600, Ax500, and Ax300 systems on releases below 03.03.25
The Axiom Slammer will run continuously for several months, then warm start, with a corrupt core dump. The warm start may succeed, or there may not be enough memory to complete the warm start, so the CU fails over and fails back.
Either of these will resolve the causing memory leak and allow the Slammer CU to run for several more months until it runs out of memory again.
If the load on the Axiom is reasonably well balanced, the two Slammer CU's in any given slammer will tend to see the warm starts or CU failovers within a few days of each other.
In the scanlog summary Slammer Log section, the signature is: PSG_NMQ PANIC_ASSERT: buf pointer is NULL
The dumper will attempt to run, but there is insufficient memory, and the dumper will fail to produce a core, or will produce a corrupt, incomplete core.
The duration the Slammer has been running continuously is encoded in the name of the Slammer log file.
For example: 100130.200703-101127.213342.GMT.podr-pa.OUTLOG where the dates are encoded as YYMMDD.HHMMSS-YYMMDD.HHMMSS GMT
This indicates that the Slammer CU has been running continuously since 2010, Jan 30 at 20:07:03 GMT.
The time of the panic is 2010, November 27th at 21:33:42 GMT
If the CU has been running continuously for more than 5-6 months, the specific memory leak is BUG 13746588 - [Legacy defect 49027][SLOW MEMORY LEAK]
If the CU has been running continuously for 2-3 months, the specific memory leak is Bug 13750977 [Legacy defect 55860] [MEMORY LEAK]
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