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Is it safe to patch Windows servers during office hours? RRS feed

  • Question

  • Hi,

    We are looking at how we can reduce downtime required for Windows patching.

    Can anyone advise if it is safe to patch the servers during office hours and leave the restart after office hours? In this case, the actual downtime will be when the servers are rebooting.

    Do the patches come into effect immediately after installation or after a server restart?

    Thank you.

    Tuesday, June 28, 2016 7:23 AM

Answers

  • It depends on the kind of workload / application you run on the server, as well as, on updates to be installed. Some updates require restart, other don't. Some updates may require restart if files that it needs to update are in use. See details for each update for info about restart requirements. In any case, update process will most likely disrupt the applications running on the server, so it will be up to you to decide how critical the application is and how its downtime will affect office operations. As for downtime, there is no way to predict exactly how long the update process will take: so the easiest option is to keep all patching outside of the working hours.

    Gleb.

    Tuesday, June 28, 2016 8:31 AM

All replies

  • It depends on the kind of workload / application you run on the server, as well as, on updates to be installed. Some updates require restart, other don't. Some updates may require restart if files that it needs to update are in use. See details for each update for info about restart requirements. In any case, update process will most likely disrupt the applications running on the server, so it will be up to you to decide how critical the application is and how its downtime will affect office operations. As for downtime, there is no way to predict exactly how long the update process will take: so the easiest option is to keep all patching outside of the working hours.

    Gleb.

    Tuesday, June 28, 2016 8:31 AM
  • I have known servers to work inconsistently after patching if they are not restarted straight away. I would advice you leave both patching and restarts to out of hours.
    Tuesday, June 28, 2016 10:53 AM
  • Hi sql_novice,

    >Can anyone advise if it is safe to patch the servers during office hours and leave the restart after office hours?

    Yeah, you can implement updates like this. But I think MikeeMicracle's suggestion is safer for your environment.

    Personally, I would recommend enabling AU policy "No auto restart when logged on users" if you don't want updates to disturb running applications when there are users logon.

    >Do the patches come into effect immediately after installation or after a server restart?

    Gleb has explained it in detail.

    Some updates need restart, some updates do not need restart. For updates that need restart, it will take affect after restart, since these updates will modify some system files, it do not know if the modification will disturb any running application and process, so it require a reboot to close these processes to avoid conflict.

    Best Regards,

    Anne


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    Wednesday, June 29, 2016 1:46 AM