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3394135 - MPX version pile up, all MPX servers needed to restart - SAP IQ


  • A connection on the coordinator causes versions pile up and user dbspace full and cannot be dropped.
  • All the 3 Multiplex (MPX) servers need to be shutdown to clear the versions.

Excerpt of coordinator's IQMSG

Allocation failed. Dbspace IQ_USER_MAIN is  OUT OF SPACE
Allocation failed. Dbspace IQ_USER_MAIN is  OUT OF SPACE
   -- Dbspace IQ_USER_MAIN full (due to versions pile up )

   -- then the coordinator is "kill -15"  and restarted

IQ OpenDatabase, checkpointblock: 907292204, recover: 1

  • The coordinator is shutdown several times.
  • In the meantime, the 2 secondary nodes continue loading tables.
  • Then, node 2 also hit "out of space" error.

As the coordinator is shutdown several times and this doesn't clear the old versions, 
the secondary node 2 needs to be shutdown with kill -9
the secondary node 3 can be shutdown gracefully with stop_iq



SAP IQ 16.1


SAP IQ 16.1


versions; "pile up"; accumulate; accumulation , KBA , BC-SYB-IQ , Sybase IQ , Problem

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