We can see a drastic difference between OpenJDK and Oracle JRE
With Oracle JRE 1Gb DRAM was used with each OneClick Client, With OpenJDK 2.7Gb DRAM is being used.
As part of our security practices, we require all OneClick users to go through our Jumpserver. This increase of ram will impact JumpServers and number of users able to connect
AdoptOpenJDK is less efficient then Oracle JRE
AdoptOpenJDK team mentions this is because of the launcher Ice Tea Web, however under further testing we saw little to no difference when using OpenWebStart as a launcher.
Release : 10.4.x 21.2.x
Component : Spectrum OneClick
OpenJDK team is unable to fix this, this only really impacts users who use a jumpserver where the resources are shared.
Reported to OpenJDK team here