The problem of not displaying correctly channels at different sampling frequencies (specifically when a 1 Hz channel is involved) is still present; dataDisplay v11r4 doesn't crash anymore but the visualization still has issues.
In addition, the AL9 machines have changed the THP khugepaged/max_ptes_none configuration from 511 (AL9 default) to 64, to stop khugepaged from inflating idle dataDisplay processes to about 2 GB by filling their sparse heap with huge pages. These 2 changes should noticeable improve dataDisplay performance for users.
In order for the configuration change to take effect, users must close any active dataDisplay sessions.