-If you have many OStatus contacts then completing of conversations can be very time wasting. The downside: You won't see every comment in OStatus threads.
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- Set "Path for lock file" to an empty folder outside your web root.
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-Lock files help avoid the possibility of several background processes running at the same time.
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-For example: It can happen that the poller.php takes longer than expected.
-When there is no lock file, it is possible for several instances of poller.php to run at the same time - which would slow down the system and affect the maximum numbers of processes and database connections.
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-Please define a full file path that is writeable by the web server process.
-If your site is located at "/var/www/sitename/htdocs/" you could maybe create a folder "/var/www/sitename/temp/".
+If you have many OStatus contacts then completing of conversations can take some time. Since you will miss several comments in OStatus threads, you maybe should consider the option "At post arrival" instead.