php: increase pm.min_spare_servers and max_spare_servers

> WARNING: [pool www] seems busy (you may need to increase … pm.min/max_spare_servers),
> spawning 8 children, there are 0 idle, and 6 total children
> WARNING: [pool www] seems busy (you may need to increase … pm.min/max_spare_servers),
> spawning 16 children, there are 0 idle, and 7 total children
> WARNING: [pool www] seems busy (you may need to increase … pm.min/max_spare_servers),
> spawning 8 children, there are 0 idle, and 7 total children
> WARNING: [pool www] seems busy (you may need to increase … pm.min/max_spare_servers),
> spawning 16 children, there are 0 idle, and 8 total children
> WARNING: [pool www] seems busy (you may need to increase … pm.min/max_spare_servers),
> spawning 32 children, there are 0 idle, and 9 total children
> WARNING: [pool www] seems busy (you may need to increase … pm.min/max_spare_servers),
> spawning 32 children, there are 0 idle, and 10 total children
> WARNING: [pool www] seems busy (you may need to increase … pm.min/max_spare_servers),
> spawning 32 children, there are 0 idle, and 11 total children
> WARNING: [pool www] seems busy (you may need to increase … pm.min/max_spare_servers),
> spawning 32 children, there are 0 idle, and 12 total children
> WARNING: [pool www] seems busy (you may need to increase … pm.min/max_spare_servers),
> spawning 32 children, there are 0 idle, and 13 total children

Author: Krinkle

modules/php/templates/fpm/pool.ini.erb

@@ -9,8 +9,8 @@ listen.group = www-data
 pm = dynamic
 pm.max_children = 20
 pm.start_servers = 2
-pm.min_spare_servers = 1
-pm.max_spare_servers = 3
+pm.min_spare_servers = 2
+pm.max_spare_servers = 8
 
 ; PHP sets log_errors=On by default, but errors go nowhere by default.
 ; Setting php_admin_value[error_log] to a file doesn't work either.