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+--- Thread: Downtime (/thread-7576.html)
Downtime - fred - 08-22-2009 09:33 PM
Hi,
When a user is added apache goes down for a bit; can this be prevented considering you cannot run serious hosting on it with this happening.
Thanks,
Fred
RE: Downtime - kilburn - 08-22-2009 11:48 PM
What do you understand by "down", and how much is a "bit"? Setting up a new virtual host REQUIRES an apache reload, during which it stops processing requests (but clients shouldn't receive any error, just a slight delay 1-2sec max).
If its something worst than that, we can try to track down the cause. Otherwise, if you can't afford an occasional 1-2sec delay you should be using some serious load balancing/failover infrastructure...
RE: Downtime - fred - 08-23-2009 12:39 AM
Well, HTML clients aren't seeing downtime, but PHP clients are; the fcgi processes are shot down even during graceful restart. And those clients are cut off (getting a nice white screen).
When processing multiple new clients / changes per hour, this becomes quite a bit of service interruption.
RE: Downtime - kilburn - 08-23-2009 05:07 AM
Maybe you're hitting this php bug. On my own tests, with this versions:
Code:
PHP/5.2.6-1+lenny3
fcgid 2.2.1
firefox 3.5.2 OSXWhat happens is that (on graceful restart) the server closes the connection by sending a FIN packet, and thereafter I've got varying results:
1. If the page was previously loaded correctly (so this is a refresh), the browser reloads the page, this time completing correctly.
2. If it's the first time I'm loading the page, the browser shows a blank page and stops.
So yes, this might be an issue. Unfortunately, it's a php+fastcgi/fcgid problem that we can't do much about, except trying with newer versions to see how is this handled. You may also switch to using mod_php5 (the panel supports it), but then you'll have a less secure server.
It's up to you... :S
RE: Downtime - fred - 08-23-2009 07:03 AM
mod_php is not really an option; it's a free hosting server.
I 'solved' it with a haproxy setup which is working fine
Thank you. Opening a new topic for the next problem