I am upgrading my moodle from 3.5 to 3.9. I am using Centos 7 server.
Requirement checks all go fine. At the stage of plugin check & upgrading the database it consumes my server's available 6G RAM till there is only 100M RAM available.
Is this normal?
Now my server is very slow and i cant even access any files on it.
Also I get this error after some time. What can I do to continue?
Error code: sessionwaiterr
- line 1269 of /lib/dml/pgsql_native_moodle_database.php: dml_sessionwait_exception thrown
- line 178 of /lib/classes/session/database.php: call to pgsql_native_moodle_database->get_session_lock()
- line ? of unknownfile: call to core\session\database->handler_read()
- line 42 of /lib/classes/session/handler.php: call to session_start()
- line 77 of /lib/classes/session/manager.php: call to core\session\handler->start()
- line 805 of /lib/setup.php: call to core\session\manager::start()
- line 25 of /config.php: call to require_once()
- line 27 of /login/index.php: call to require()