mbox operations performance issue

[Eric Luyten]

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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