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From: "Dennis Hagarty (dehagart)" <dehagart AT cisco DOT com>
To: Achim Gratz <Stromeko AT nexgo DOT de>, "cygwin AT cygwin DOT com" <cygwin AT cygwin DOT com>
Subject: RE: Very slow Cygwin startup on Windows 7
Date: Mon, 9 Feb 2015 18:18:04 +0000
Message-ID: <3FEEC3A37A0B0A48AA326075128C32EE4DC9F137@xmb-rcd-x01.cisco.com>
References: <3FEEC3A37A0B0A48AA326075128C32EE4DC9F0E8 AT xmb-rcd-x01 DOT cisco DOT com> <87mw4nugdx DOT fsf AT Rainer DOT invalid>
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>> Well, nsswitch.conf was a good suggestion - I'd left it as the default
>> (which is empty), but I added a 'files' entry and it came good again.
>> Changing the passwd and group entries to 'files db' makes it very slow
>> again.
>
>Limit the number of entries that Cygwin fetches from the DC.  Also,
>starting a cygserver would help.
>
>> Not sure what changed here, I have a very good connection to my DC,
>> but obviously something wrong here now.
>
>You may be surprised at how slow a DC really can be when it sees some
>load, regardless of connection speed when you try to fetch several
>thousand entries.  If I were to try a 'mkpasswd -d' on our DC I'd
>usually have to wait about an hour with very little network traffic to
>show (the resulting file would be about 4MiB).
>
>
>Regards,
>Achim.

Thanks Achim - I've recreated my passwd and group files to be sure.
I checked some domain lookups and they take a second or two for each entry - quite slow. 

So, I'll leave nsswitch where it is for now and I've started cygserver.

But I'm just wondering how this failed after I updated - I was using it successfully 30 mins previously.
I've had it configured this way for years.

Thanks for the assistance and explanations.
Cheers
Dennis

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