Please upgrade to the latest version, if a new core file is generated, then follow https://docs.litespeedtech.com/lsws/cp/cpanel/bug-report/ and share it to support@litespeedtech.com
"For shell environment variables used inside the Apache configuration file", it will not replace the env value to the OLS/LSWS config directly. Please set the value to the config file.
oh, I see, you want to use the old version. This PHP version is end of life so we will not build it more on a new platform. The old platform may still support, e.g. bionic
Have you set up a listener yet?
https://docs.openlitespeed.org/configuration#set-up-listeners
I am not familiar with the spring boot web app, if it's running locally and you need ols run as a reverse proxy, then you might also want to follow https://docs.openlitespeed.org/docs/advanced/proxy...
it's on the to do. If you need imagick package for lsphp81 now, you can follow https://docs.litespeedtech.com/lsws/extapp/php/extensions/#the-pear-package-manager to build it manually.
To limit CPU, maybe you can check https://openlitespeed.org/kb/using-cgroups-with-openlitespeed/
But you might also want to check which process caused the load when updating the XML feeds with `top` command.
Although there's no PHP tab, but you should be able to create a dedicated External App for Cloudlinux PHP selector by following "How to set up LiteSpeed version lower than 5.3 to use PHP Selector".