[BlueOnyx:06830] Re: slow Sendmail response

[Chuck Tetlow]

DNS.  That's classic DNS problem symptioms.  The various servers are performing a reverse lookup to log the entries by name - and you are waiting on the DNS timeout.  I bet you'll find the logs for both mail and SSH are full of IPs, with very few names.

Check your DNS settings to be sure you have a valid/good DNS server listed as first in the /etc/resolv.conf file.  You can modify that file by hand or via the GUI in the system settings.

Chuck

---------- Original Message -----------
From: "Roy Urick" <rurick at usa.net> 
To: <Blueonyx at blueonyx.it> 
Sent: Mon, 28 Mar 2011 12:19:33 -0400 
Subject: [BlueOnyx:06825]  slow Sendmail response

> After migrating from a low powered BQ box to an overpowered BO box, my users have reported that Sendmail is incredibly slow to respond. They noted that emails sit in their outlook outbox for quite a while before transferring over. 
>  
> I also noticed that if I telnet to port 25, it connects instantly, but it’s a good 10 seconds before I am greeted with a banner. 
> Connecting via SSH also exhibits a 10+ second lag before it tries to log in. 
> Connecting via the GUI is instantaneous. 
>  
> The server is sitting almost idle and is barely working at all (99%id, all others sitting at <0.5%). 
>  
> Any ideas on what to check first? 
>  
>  
>  
> Thank you,
>  
>  
> Roy Urick
> IT Department
> Koorsen Fire & Security
> 2719 N Arlington Ave
> Indianapolis, IN 46218
> 317-225-5027 (IP Phone x2796)
>  
>  
>   ­­  
------- End of Original Message -------
 
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