ASYNC_IO_COMPLETION while BACKUP DATABASE running

  • Is it normal for this lastwaittype to last for the entire duration of a backup database command? We're seeing the waittime just continue to tick up until the backup job finishes. I'm wondering if that is a sign of some kind of problem on the storage or infrastructure.

  • Could be a disk bottleneck, or latency if you're backing up to a network share.

    There's some discussion and good advice here:

    http://social.msdn.microsoft.com/Forums/sqlserver/en-US/7542f102-854f-4283-874c-2d78a2d85feb/full-database-backup-takes-so-long

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  • DoolinDalton (11/12/2013)


    Is it normal for this lastwaittype to last for the entire duration of a backup database command? We're seeing the waittime just continue to tick up until the backup job finishes. I'm wondering if that is a sign of some kind of problem on the storage or infrastructure.

    Hi Did you find your answer already?

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