The upgrade of the 'main' syslog table can be a very time consuming process.As such, it is recommended that you either reduce the size of your syslog table prior to upgrading, or choose the background option</p> <p>If you choose the background option, your legacy syslog table will be renamed, and a new syslog table will be created.Then, an upgrade process will be launched in the background.Again, this background process can quite a bit of time to complete.However, your data will be preserved</p> <p>Regardless of your choice, all existing removal and alert rules will be maintained during the upgrade process.</p> <p>Press <b>'Upgrade'</b> to proceed with the upgrade, or <b>'Cancel'</b> to return to the Plugins menu.