David Gerard wrote:
steven l. rubenstein wrote:
Half the time I click on "Save Page" the next screen is a "Preview" (and my edits are not yet saved). I have been careful about this, and am definitely clicking on "Save Page," not "Show Preview." And this is happening a lot. Is this happening to anyone else, or is it just me? Does anyone have any idea why it is happening?
Been happening to me too, on meta as well as en. (I've been adding to [[m:Bash]].)
It's a known symptom of a very busy database - rather than committing the change, it dumps you back to the preview screen.
News to me. If the database is too busy, you should get a timeout screen or a "cannot contact database server" error message.
We don't know exactly why this problem happens, but it's probably caused by loss or temporary unavailability of session data. Brion says we still got these reports when we put sessions in NFS, so memcached can't explain the problem in its entirety, but nonetheless I'd be inclined to think the current increase in reports is due to load on the memcached servers. We should probably try installing memcached on another 10 or 15 servers and see if that fixes the problem.
A closely related problem is being spontaneously logged out if you didn't select the "remember me" checkbox when you logged in.
-- Tim Starling