Hello!
I think I have a problem with W3 Total Cache.
I have a busy site: database is around 600mb of size, daily traffic is about 12k uniques.
My page cache method: Disk Enhanced
When I set this setting:
Page cache: Garbage collection interval: 3600
I got the following error in my Error log:
[11-Dec-2013 20:51:03 UTC] WordPress database error MySQL server has gone away for query SELECT option_value FROM wp_options WHERE option_name = '_transient_doing_cron' LIMIT 1 made by _get_cron_lock
[11-Dec-2013 21:50:40 UTC] WordPress database error MySQL server has gone away for query SELECT option_value FROM wp_options WHERE option_name = '_transient_doing_cron' LIMIT 1 made by _get_cron_lock
[11-Dec-2013 22:51:30 UTC] WordPress database error MySQL server has gone away for query SELECT option_value FROM wp_options WHERE option_name = '_transient_doing_cron' LIMIT 1 made by _get_cron_lock
[11-Dec-2013 23:50:43 UTC] WordPress database error MySQL server has gone away for query SELECT option_value FROM wp_options WHERE option_name = '_transient_doing_cron' LIMIT 1 made by _get_cron_lock
[12-Dec-2013 00:51:21 UTC] WordPress database error MySQL server has gone away for query SELECT option_value FROM wp_options WHERE option_name = '_transient_doing_cron' LIMIT 1 made by _get_cron_lock
As you can see the server receives an error every hour.
Then I set “Garbage collection interval”: 1800
I got the following error in my Error log:
[13-Dec-2013 07:52:11 UTC] WordPress database error MySQL server has gone away for query SELECT option_value FROM wp_options WHERE option_name = '_transient_doing_cron' LIMIT 1 made by _get_cron_lock
[13-Dec-2013 08:21:41 UTC] WordPress database error MySQL server has gone away for query SELECT option_value FROM wp_options WHERE option_name = '_transient_doing_cron' LIMIT 1 made by _get_cron_lock
[13-Dec-2013 08:51:17 UTC] WordPress database error MySQL server has gone away for query SELECT option_value FROM wp_options WHERE option_name = '_transient_doing_cron' LIMIT 1 made by _get_cron_lock
As you can see now the server receives an error every half an hour.
Can you help me to solve this problem?
Regards.