I experience that beanstalkd uses a lot CPU cycles when the system is under
high load. This, even when beanstalkd is not in use.
This simple test shows the issue in effect:
* beanstalkd v1.8 on an Amazon EC2 Large instance with Ubuntu Linux 12.04.2
LTS.
* No jobs in beanstalkd
* Saturate the available CPU cycles with a couple of nice'd dummy
processes, using:
`nice -n 10 python -c "while True: x=2**10"&`
In this test beanstalkd (according to top) uses between 15% and 20% of the
CPU cycles. As soon as the high load is stopped, beanstalkd goes back to
nearly ~0% CPU.
This observed behaviour is quite unfortunate. So what is happening, and is
it expected behaviour?
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