Spike is Gateway timeouts
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Back in September our site had a spike in 504 errors. only 3 in August out of 20K hits, but 5% of hits in September and October. We might have added more pages in September, but the site isn't that big. Siteground tech support changed the timeout value for the site, but this seems strange to me.
Download FireFox and install FireBug. Open the console and look for 404 errors on missing view.css files. Sometimes when new block templates are created, the controller looks for a view.css file that doesn't exist. The console will also point out any Ajax loads that are taking too long.
I might have made some changes that will keep it from happening now, but thanks for the tip.
