Increase PHP-FPM idle timeout setting

Question

We have recently migrated to PHP-FPM. However we have encountered a problem with some long running scripts. The code looks roughly like:

foreach ($items as $item) {
     set_time_limit(30);
     proccessThatTakesAround2secs(); 
}

The normal PHP script time limit is also 30 secs. This was previously working fine in that we reset the remaining time limit back to 30 secs for each item. There are around 1000 items meaning the script in total would normally take about 30 mins to complete. However we have since reached the following problem:

FastCGI: comm with server "/usr/local/php-5.6.24/sbin/php5-fpm" aborted: idle timeout (30 sec)

Now my question is, is it sensible to increase the idle timeout to something like an hour but still ensure the PHP scripts don't run for longer than 30 secs, unless we use set_time_limit? Is there a way to set the idle timeout on a per script basis (something akin to a set_time_limit?)

Here is our pool configuration:

[www]
user = www-data
group = www-data
listen = /var/run/php5-fpm.sock
listen.owner = www-data
listen.group = www-data
pm = static
pm.max_children = 55
pm.max_requests = 10000

php_value[memory_limit] = 128M
php_value[max_execution_time] = 30
php_value[upload_max_filesize] = 20M
php_value[post_max_size] = 20M
php_value[max_input_vars] = 9999

And here is our fastcgi.conf

<IfModule mod_fastcgi.c>
    AddType application/x-httpd-fastphp5 .php
    Action application/x-httpd-fastphp5 /php5-fcgi
    Alias /php5-fcgi /usr/local/php-5.6.24/sbin/php5-fpm
    FastCgiExternalServer /usr/local/php-5.6.24/sbin/php5-fpm -socket /var/run/php5-fpm.sock -idle-timeout 30 -pass-header Authorization
    <Directory /usr/local/php-5.6.24/sbin/>
        Require all granted
   </Directory>
</IfModule>

Answer 1

While this doesn't necessarily fit the OP's configuration, most people are going to be running PHP-FPM under a proxy setting. As such, you can set the timeout for a proxy setup like so (this is my php.conf)

<Proxy "fcgi://127.0.0.1:9000">
   ProxySet timeout=300
</Proxy>

<FilesMatch \.php$>
    SetHandler application/x-httpd-php
    SetHandler "proxy:fcgi://127.0.0.1:9000"
</FilesMatch>

If you're using a .sock file instead, just replace both instances of fcgi://127.0.0.1:9000 with the command to use the sock file