Pm.max_children error

am using latest docker version, default setup.
last few days am getting error on app’s container console

is there any file where i can set or change pm.max_children?

[18-Jan-2023 01:24:09] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[18-Jan-2023 01:32:09] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[18-Jan-2023 02:49:58] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[18-Jan-2023 02:50:59] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[18-Jan-2023 02:51:58] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[18-Jan-2023 22:25:12] ALERT: oops, unknown child (9179) exited with code 128. Please open a bug report (https://github.com/php/php-src/issues).
[19-Jan-2023 01:28:52] ALERT: oops, unknown child (13168) exited with code 128. Please open a bug report (https://github.com/php/php-src/issues).
[19-Jan-2023 01:28:52] ALERT: oops, unknown child (13173) exited with code 128. Please open a bug report (https://github.com/php/php-src/issues).
[19-Jan-2023 01:28:52] ALERT: oops, unknown child (13178) exited with code 128. Please open a bug report (https://github.com/php/php-src/issues).
[19-Jan-2023 01:28:53] ALERT: oops, unknown child (13183) exited with code 128. Please open a bug report (https://github.com/php/php-src/issues).
[19-Jan-2023 01:28:53] ALERT: oops, unknown child (13188) exited with code 128. Please open a bug report (https://github.com/php/php-src/issues).
[19-Jan-2023 01:28:53] ALERT: oops, unknown child (13193) exited with code 128. Please open a bug report (https://github.com/php/php-src/issues).
[19-Jan-2023 01:28:53] ALERT: oops, unknown child (13198) exited with code 128. Please open a bug report (https://github.com/php/php-src/issues).
[19-Jan-2023 02:29:09] ALERT: oops, unknown child (14637) exited with code 128. Please open a bug report (https://github.com/php/php-src/issues).
[19-Jan-2023 02:47:02] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[19-Jan-2023 02:48:01] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[19-Jan-2023 02:59:01] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[19-Jan-2023 03:07:01] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[19-Jan-2023 03:08:00] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[19-Jan-2023 03:28:52] ALERT: oops, unknown child (17376) exited with code 128. Please open a bug report (https://github.com/php/php-src/issues).
[19-Jan-2023 03:28:52] ALERT: oops, unknown child (17381) exited with code 128. Please open a bug report (https://github.com/php/php-src/issues).
[19-Jan-2023 03:28:52] ALERT: oops, unknown child (17386) exited with code 128. Please open a bug report (https://github.com/php/php-src/issues).
[19-Jan-2023 03:28:53] ALERT: oops, unknown child (17391) exited with code 128. Please open a bug report (https://github.com/php/php-src/issues).
[19-Jan-2023 03:28:53] ALERT: oops, unknown child (17396) exited with code 128. Please open a bug report (https://github.com/php/php-src/issues).
[19-Jan-2023 03:28:53] ALERT: oops, unknown child (17401) exited with code 128. Please open a bug report (https://github.com/php/php-src/issues).
[19-Jan-2023 03:28:54] ALERT: oops, unknown child (17406) exited with code 128. Please open a bug report (https://github.com/php/php-src/issues).
[19-Jan-2023 03:33:01] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[19-Jan-2023 03:34:00] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[19-Jan-2023 03:51:02] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[19-Jan-2023 14:31:57] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[19-Jan-2023 14:32:13] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[19-Jan-2023 14:33:02] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[19-Jan-2023 14:34:02] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[19-Jan-2023 15:31:53] ALERT: oops, unknown child (20618) exited with code 128. Please open a bug report (https://github.com/php/php-src/issues).
[19-Jan-2023 15:31:53] ALERT: oops, unknown child (20623) exited with code 128. Please open a bug report (https://github.com/php/php-src/issues).
[19-Jan-2023 15:31:54] ALERT: oops, unknown child (20628) exited with code 128. Please open a bug report (https://github.com/php/php-src/issues).
[19-Jan-2023 15:31:54] ALERT: oops, unknown child (20633) exited with code 128. Please open a bug report (https://github.com/php/php-src/issues).
[19-Jan-2023 15:31:54] ALERT: oops, unknown child (20638) exited with code 128. Please open a bug report (https://github.com/php/php-src/issues).
[19-Jan-2023 15:31:55] ALERT: oops, unknown child (20643) exited with code 128. Please open a bug report (https://github.com/php/php-src/issues).
[19-Jan-2023 15:31:55] ALERT: oops, unknown child (20648) exited with code 128. Please open a bug report (https://github.com/php/php-src/issues).

thanks in advance

https://dev.tt-rss.org/tt-rss/ttrss-docker-compose/src/branch/master/app/Dockerfile#L31

you can also adjust memory limit (same file, next line).

ok so i raised

PHP_WORKER_MAX_CHILDREN=10
PHP_WORKER_MEMORY_LIMIT=512M

now i am getting this warning

[20-Jan-2023 01:03:34] WARNING: [pool www] seems busy (you may need to increase pm.start_servers, or pm.min/max_spare_servers), spawning 8 children, there are 0 idle, and 6 total children
[20-Jan-2023 01:03:35] WARNING: [pool www] seems busy (you may need to increase pm.start_servers, or pm.min/max_spare_servers), spawning 16 children, there are 0 idle, and 7 total children
[20-Jan-2023 01:03:36] WARNING: [pool www] seems busy (you may need to increase pm.start_servers, or pm.min/max_spare_servers), spawning 32 children, there are 0 idle, and 8 total children
[20-Jan-2023 01:03:37] WARNING: [pool www] seems busy (you may need to increase pm.start_servers, or pm.min/max_spare_servers), spawning 32 children, there are 0 idle, and 9 total children
[20-Jan-2023 01:03:38] WARNING: [pool www] server reached pm.max_children setting (10), consider raising it
[20-Jan-2023 01:03:47] WARNING: [pool www] server reached pm.max_children setting (10), consider raising it

thanks @fox

FYI @fox, this error starts with docker tag 22.12-72e64bdb7
its all good if i go back to 22.12-fa9c614ff