PHP 7 FPM slow log file location

Question

In my www.conf file, there is this line:

slowlog = log/$pool.log.slow

Where is that on Ubuntu?

Answer 1

Short answer: probably at /var/log/php7-fpm/www.log.slow.

The $pool variable is set from the configuration section name at the top of that same file. Since the file name is www.conf, I'd bet the pool name is www, specified on the top line of the file like so: [www]. (So far, I can't find how we end up in /var/log/php7-fpm.)

Answer 2

slowlog = log/$pool.log.slow

This setting creates a file in a /usr directory. We had issues with it because of permission errors.

Because it's not fully determistic we just define an absolute path to /var/log/ which is where we want to store the files:

slowlog = /var/log/$pool.log.slow

$pool will be by default be replaced by "www" but can be configured different when desired.