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Unable to start Livecache after upgrade from MaxDB 7.4 to 7.5

Former Member
0 Kudos

Hi All,

I have an issue, unable to start Livecache after upgrade from MaxDB 7.4 to 7.5 with the following error in knldiag.err file:

2012-09-10 20:56:35 1 ERR 11872 MEMORY   Not enough memory for I/O buffer cache wanted : 5176000 kB!
2012-09-10 20:56:35 0 ERR 11979 DBCRASH  Kernel exited without core and exit status 0x200
2012-09-10 20:56:35 0 ERR 11983 DBCRASH  Kernel exited exit code 2
2012-09-10 20:56:35                      ___ Stopping GMT 2012-09-10 17:56:35       7.5.0Build 035-123-123-944
2012-09-10 20:58:55                      --- Starting GMT 2012-09-10 17:58:55       7.5.0Build 035-123-123-944
2012-09-10 20:58:59 1 ERR 11872 MEMORY   Not enough memory for I/O buffer cache wanted : 5176000 kB!
2012-09-10 20:58:59 0 ERR 11979 DBCRASH  Kernel exited without core and exit status 0x200
2012-09-10 20:58:59 0 ERR 11983 DBCRASH  Kernel exited exit code 2
2012-09-10 20:58:59                      ___ Stopping GMT 2012-09-10 17:58:59       7.5.0Build 035-123-123-944

I didn't make any changes in ulimit, etc as it was working fine before in MaxDB 7.4.

Even I tried to decrease CACHE_SIZE, but still no lock. Please advice if anyone having similar issue.

Regards,

Yohanes

Accepted Solutions (1)

Accepted Solutions (1)

former_member229109
Active Contributor
0 Kudos

Hello Yohanes,

" MEMORY   Not enough memory for I/O buffer cache wanted : 5176000 kB!!"


memory errors in the knldiag.err file during the liveCache restart could be, because, for example:
a) there was realy not enough memory so livecache kernel was not able to allocate free memory from OS

b) you were trying to start liveCache with different user with OS user limit  "system limit" set too low/strictly

c) You were trying to start liveCache remotely and x_server was started with OS user limit  "system limit" set too low/strictly


Check in knldiag and xserver prt more details.

What is OS platform of the liveCache server?

Please review the SAP notes::

   628131     SAP DB / MaxDB operating system parameters on U...

   487972     Operating system parameterization of liveCache

As you are SAP customer => Please create the SAP message and attach to the message liveCache knldiag and xserver*.prt logs. After The liveCache logs will be checked, further recommendations could be made.

Regards, Natalia Khlopina

Former Member
0 Kudos

Hi Natalia,

Thanks for your suggestion, we already solved the issue by set the ulimit data to unlimited.

Regards,

Yohanes

Answers (0)