APC and “apc.gc_ttl” :: How Low is Too Low

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I currently have my apc.gc_ttl set to 600 to help keep fragmentation down.

Since apc.gc_ttl just sets the time on cache for garbage collection, I don't see any harm in keeping it this low.

However, I'm new to APC, and have seen many configurations online that use a 3600 TTL, which seems quite long to me for garbage collection cache…

Is 600 too low? Is 3600 too high?

As I'm sure mileage varies on this setup, is there a good rule of thumb to follow?

Best Answer

600 is not low for apc.gc_ttl and 3600 is actually the default value, you are right that it will vary on different installations, I have mine set to 600 as well.

Related Solutions

Disable or Remove APC

Instead of removing APC, which will cause a massive performance hit, and effectively shoot yourself in the foot..

Try this: in /etc/php5/conf.d/apc.ini:

extension=apc.so
apc.shm_size=128M
apc.shm_segments=1
apc.max_file_size=5M
apc.num_files_hint=10000
apc.slam_defense = 0
apc.write_lock=1

You can increase apc.shm_size to a value bigger than 128, say 512 if you had sufficient free RAM.

I did this on a server I run, and never ever see Unable to allocate memory for pool errors.

I cannot install APC

yum install pcre-devel . You need the Perl-compatible regular expression library development header files

You mention Ubuntu, might as well use apt-get install libpcre3-dev

Best Answer

Related Solutions

Disable or Remove APC

I cannot install APC

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