[LRUG] Sites drop off web

[Jared Patterson]

One possible tool you could use is SAR, which you could cron to monitor system activity during / around that time of day, maybe monitor Disk and Network IO to verify if either of these is the root cause .....

-----Original Message-----
From: chat-bounces at lists.lrug.org [mailto:chat-bounces at lists.lrug.org] On Behalf Of Andrew Stewart
Sent: 22 July 2011 11:39
To: London Ruby Users Group
Subject: Re: [LRUG] Sites drop off web

On 22 Jul 2011, at 11:29, George Palmer wrote:
> Yeah I'd personally check the sites at that time (as painful as it may be).  The other thing to watch is BST/GMT differences - is it definitely 4:30?
> 
> On 22 July 2011 11:27, Neil Middleton <neil.middleton at gmail.com> wrote:
> Connectivity?
> 
> Neil

Thanks for all the responses.

I'll ask the VPS provider if they backup their images then, or anything else which might affect connectivity.

I checked root's crontab; there's nothing there around the time in question.

I'll also run try to ssh into the boxes at 4.30am and see what happens.

Regarding timezones, I've checked the times and I don't think I'm mistaken.  The VPSs run on EST, currently five hours behind UK time.  I receive the emails from Pingdom at 4.30am UK time, which equates to 11.30pm the previous day on the VPS, and that's the time I've been looking for in the servers' logs.

Cheers,
Andy

-------
http://airbladesoftware.com
_______________________________________________
Chat mailing list
Chat at lists.lrug.org
http://lists.lrug.org/listinfo.cgi/chat-lrug.org

________________________________________________________________________
In order to protect our email recipients, Betfair Group use SkyScan from 
MessageLabs to scan all Incoming and Outgoing mail for viruses.

________________________________________________________________________