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Using the Message Log to Monitor Disabling I/O Errors

The database server sends the following message to the message log when a disabling I/O error occurs:

Assert Failed: Chunk {chunk-number} is being taken OFFLINE.
Who: Description of user/session/thread running at the time
Result: State of the affected database server entity
Action: What action the database server administrator should take
See Also: DUMPDIR/af.uniqid containing more diagnostics

The result and action depend on the current setting of ONDBSPDOWN, as described in the following table.

ONDBSPDOWN Setting Result Action
0 Dbspace {space-name} is disabled. Restore dbspace {space-name}.
1 The database server must abort. Reinitialize shared memory.
2 The database server blocks at next checkpoint. Use onmode -k to shut down, or use onmode -O to override.

For more information about interpreting messages that the database server sends to the message log, see the chapter about message-log messages in the IBM Informix: Administrator's Reference.

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