Frederick Cheung wrote:
> change the value of config.active_record.verification_timeout to
> something below whatever timeout your mysql timeout is set to.

It was also suggested elsewhere
http://stackoverflow.com/questions/131481/preventing-mongrelmysql-errnoepipe-exceptions
that I do the following:
(full advice is at 
https://boxpanel.blueboxgrp.com/public/the_vault/index.php/Mongrel_/_MySQL_Timeout
 
)

# Set the verification timeout so that the mongrel connection won't die 
if left alone (1 week)
ActiveRecord::Base.verification_timeout = 604800

# Keep Connection Open
Thread.new {
  loop {
    ActiveRecord::Base.verify_active_connections!;
    1800.times { sleep 2 }
  }
}.priority = -10

and also (in mysql.cnf)
# Fix for bug where mongrel doesn't close timed-out connections:  Just 
don't time out connections.
wait_timeout= 3456000

Why is that thread calling verify_active_connections! needed if 
verification_timeout < wait_timeout ?
-- Mike Berrow


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