On 7.6.2010, at 21.40, Philip Coackley wrote:

> This only appears as more users logged into the system.

How much is "more"?

> Jun  7 15:23:07 mail dovecot: auth-worker(default): ltdb: 
> tdb(/var/lib/samba/group_mapping.ldb): tdb_mmap failed for size 77824 (Cannot 
> allocate memory)
..
> auth default:
> worker_max_count: 60
> worker_max_request_count: 25

Possibility 1) Decrease worker_max_request_count to 1.

Possibility 2) Increase auth_process_size

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