The "runcronjobs.php" script doesn't modify any ".log" files by default (log files are located in the "var/log" directory). If you need this, run the script using both "-d" and "--logfiles" parameters:
>...what's the subtreeexpirycleanup.php file used for?
If you are using the "cache-block" template function with the "subtree_expiry" parameter to cache the contents of a template block, this cache block will only expire if an object is published below the given subtree (instead of the entire content node tree). The "DelayedCacheBlockCleanup" setting located in the "[TemplateSettings]" section of the "site.ini" configuration file controls whether expired cache blocks with the "subtree_expiry" parameter will be removed immediately or not. If this setting is enabled, the expired cache blocks must be removed manually or using the "subtreeexpirycleanup.php" cron job script.
>Anyone from eZ can help in explaining what the single scripts do and where the cronjob logs are produced?