We have migrated from Sitecore 8 to Sitecore 10.1. During the content migration, we used Sitecore packages.
I've observed that smaller packages install quickly, but larger packages (above 200MB) take an extensive amount of time. While tracking the Sitecore logs, I noticed that the 'Installing item:' message appears to complete within a couple of hours.
However, the Sitecore package installation window continues to show the 'installing' message for another couple of hours, with no further 'Installing item:' entries in the Sitecore logs. Eventually, the successful installation package message is displayed on the Sitecore package window.
My question is whether it is safe to cancel the package installation window if I don't see any more 'Installing item:' entries in the Sitecore log. Additionally, I usually rebuild indexes after installing a large package.