Articles tagged 'debugging'

Writing a (Ruby) compiler in Ruby bottom up - step 26

I published the last article in this series in June 2010, after a long break. At the time of finally making a serious start to this part, it was April 2013, and as of the time I am editing and putting the final touches on this, it is July 2013, and ...

OpenVZ and Apache troubleshooting: PRNG still contains insufficient entropy!

I was setting up Apache on OpenVZ earlier today, and ran into a problem with enabling SSL. Apache would refuse to start, and I'd see this in the error log:

 [Sat May 24 07:48:10 2008] [warn] Init: PRNG still contains insufficient entropy! [Sat May 24 07:48:10 2008] [error] Init: ...

OpenVz, /proc/user_beancounters and tcpsndbuf

If you're using OpenVz, you owe it to yourself to take a look at /proc/user_beancounters every now and again. Just today at work we were having bizarre problems with one of the containers:

Everything would seemingly work fine. Then the load would spike from 0.something to 150+ in less than a ...