I'm unable to find any documentation on this config option:
Feature was introduced in #13822
I've checked the forums and global.ini.php for help but there is no docs on its usage:
Reading from the code, I get that it is related to how often one should purge data in table
I've made a PR to add some docs to this, https://github.com/matomo-org/matomo/pull/15492, but also to add a user-definable value for how many rows to analyze in one iterations. Our
log_action table contains >100M rows, so pruning data takes a while.
It's basically how much time is in between matomo tries to delete unused actions again
Created a new PR for 4-x.dev branch. Original post updated.
Good to get a verification on the intended usage for the variable.