Hi Sébastien,

I'm not sure if this is related to your problems but I had issues when I was 
using a Windows MySQL server on a linux host when I couldn't perform a DNS 
lookup on the linux host.  It was a custom program but it would pause for 2 
seconds or so for every DB query that was run.

Simply turning off DNS lookup in the mysql config (or I guess adding proper DNS 
records for your arch machine on your name servers might help).

http://www.linuxask.com/questions/disable-dns-hostname-lookup-in-mysql

Link for more info.  I also had a weird problem with firewalls on the client 
machine (your arch linux machine in your case) causing weird delays so have a 
look there if that doesn't help.

Regards,

Wayne


-----Original Message-----
From: [email protected] on behalf of Sébastien 
Leblanc
Sent: Wed 16/11/2011 23:54
To: Rivendell mailing list
Subject: [RDD] Rivendell apps unresponsive
 
We are having some difficulties with our new radio setup. It is
freshly installed, running under Arch Linux with an AudioScience card.

Most of the times, when we click some buttons on some apps, Rivendell
does not respond for as much as 15 seconds. You will understand that
this kind of delay is unacceptable in a production environment. I have
tried running ltrace against Rivendell. Results are not conclusive, as
they often change, but it might give a hint on what is going on.

The command I ran was:
  ltrace -c -C -S -o <filename> -p `pidof rdlogedit`

RDLogEdit -> Action: Pressed "Voice tracker" while selecting a log.
 http://pastebin.com/L6s8eE4x

RDLibrary -> Action: Pressed "OK" after editing a cart.
 01. http://pastebin.com/dcXsCSXg
 02. http://pastebin.com/0a1ipbfW
 03. http://pastebin.com/ZQrY2dq6

I always ran `ltrace` only for the time it took to perform the action,
then i ^C'd it as soon as the app was responsive.

I suspect that it might be an issue with SQL queries taking longer
than they should... Anyone having this problem?
-- 
Sébastien Leblanc
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