Improving apache start up times on Gentoo Linux
On my Gentoo virtual server, apache was taking up to 3 minutes to startup. The problem is caused by the system having too little entropy to generate random numbers needed for the PID. You can check the value on your machine using
cat /proc/sys/kernel/random/entropy_avail
A value below 20 is quite low. Emerging rng-tools can increase entropy and allow apache to start up more quickly.
emerge rng-tools
/etc/init.d/rngd start
/etc/init.d/apache2 start
Apache should now start in seconds.
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January 6th, 2006 at 11:22 pm
The better solution is to enable the (recently added) urandom USE flag and re-remerge apr