I just tried to enable zstd on the mongo.mongoUri connection string for Ops Manager and it looks like it's not supported

Feb 6 13:53:20 opsmanager1 mongodb-mms[3971104]: An unexpected error occurred during pre-flight checks: com/github/luben/zstd/ZstdInputStream
Feb 6 13:53:20 opsmanager1 mongodb-mms[3971104]: java.lang.NoClassDefFoundError: com/github/luben/zstd/ZstdInputStream

Given the high network in/out values we see from the mongo underlying Ops Manager, I think zstd is likely to be very effective and helpful!