On 08 Apr 2016, at 09:19, martijn.list martijn.list@gmail.com wrote:

Hi,

I have created my own dict server (proxy:[<dict path>]:<destination dict>) to access a proprietary database.

What happens if the dict server lookup is slow? for example because the lookup process takes some time?

Looking at the code, there's a 30sec timeout:

/* Abort dict lookup after this many seconds. */ #define DICT_CLIENT_READ_TIMEOUT_SECS 30 /* Log a warning if dict lookup takes longer than this many seconds. */ #define DICT_CLIENT_READ_WARN_TIMEOUT_SECS 5

Does Dovecot access the dict proxy from multiple threads or is this a single threaded process?

It depends on what you're using the dict for. If you're using passdb-dict or userdb-dict, then I think all the lookups are coming from the one auth master process. If you're using it elsewhere, then you'll probably be getting connections from many different processes.