Mail Merge is Slow on On-premise Databases

When executing mail merge on on-premise databases, the system will check to see if the memory usage is too high. To prevent running out of memory in this situation, after clicking the mail merge button, the system will wait until the memory usage is back to normal before completing the mail merge.

You may go to the private server config to download lowMemoryDump.log to check if there is a high memory usage situation.