Re: mbox operations performance issue

Eric Luyten via Info-cyrus <info-cyrus@xxxxxxxxxxxxxxxxxxxx> · Fri, 20 Jan 2017 15:11:27 +0100



    On 20/01/17 15:03, Miguel Mucio Santos
      Moreira via Info-cyrus wrote:

    
      Dears,

      
      I've had a problem for some days with mailboxes operations like
      sam, dam etc.

      Those operations are too slow, I have some mailboxes with many
      subfolders when I applied a sam command to allow other user access
      it, the command spends too much time (e.g 20hours).

      There's nothing weird in logs or etc.

    
    I/O contention on the device where your mailboxes.db is stored ?

    
    This file can grow pretty large (with many 'holes' in it).

    Here, after every user mass delete (once or twice a year) I
    'compact'

    it by dumping to text and 'undumping' back into skiplist.

    Oh, and it's stored on Solid State.

    
    Eric.

    
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