What To Do About Yahoo Slurp Bot Bogging My Site Down?

[RobbieFoglia]

Hello,

Our IT department has informed me that they have seen extremely heavy traffic from the Yahoo Slurp bot in recent days. They are claiming this bot has single-handedly caused one of our servers to crash.

I am a bit skeptical of this, as I have not found these particular legitimate search engine bots to be aggressive resource hogs, especially for an enterprise-level web server.

I have requested to examine the server logs myself, but have not had success with this. IT is requesting to block this particular bot, but I am apprehensive about doing this, as I don't want this to have any negative implications on our site showing in Yahoo News or other Yahoo properties.

Does anyone else have experience with this bot being an overly-zealous resource drag, and if so, what is the best course of action to satisfy all parties?

[N1ghteyes]

Examining the server logs yourself probably wont help your understanding of the issue unless you know what your looking at specifically. On the Yahoo note, i have found Slurp to be really bad in the past, but no legitimate bot should be able to bring down a properly configured web server, especially an 'enterprise-level' one.

I would check your .htaccess and apache settings for bad redirects (or web.conf if on windows) before considering banning the bot. Other things to check would be website code or if a bot hits a massive and horribly optimised Database Query for example, that could bring the server down.

Ask IT exactly what the bot did that caused the server to go down, they should atleast be able to tell you that. If not then they need to run load tests against the website itself to try and reproduce the scenario and thus debug the issue, if indeed there is one.

Tl;dr :- Normally bad config or code / queries are to blame for this kind of thing. I'd review that before blocking a bot that crawls hundreds of thousands of other sites without issue.

[john4math]

You should be able to can control the rate at which the bot accesses you pages by adding a crawl delay in your robots.txt file. Robots.txt and crawl delay is discussed here: http://en.wikipedia.org/wiki/Robots_exclusion_standard, and Slurp bot here: https://help.yahoo.com/kb/SLN22600.html.

Should look like this in your robots.txt file:

User-agent: Slurp

Crawl-delay: 30

The crawl delay is the number of seconds the bot should wait between pageview (ask your IT guys what's appropriate for you).  I stuck 30 in there, meaning the Slurp bot would only be able to access up to 2 pages a minute.