I would like to draw your attention to a blog post by Joost Pronk van Hoogeveen: “Announcing a new simplified Support Repository Update (SRU) schedule for Oracle Solaris 11.4 and ZFS Storage Appliance software”.
Up to now, Solaris 111 had three SRU releases per quarter: one in the “Critical Patch Update (CPU)” timeframe containing mostly security fixes2, one with all the new features2, and one in between with regular bug fixes only. So a new SRU was released every 4 weeks.
In the future there will be two releases per quarter, one with the security fixes2 and one with the new features2. The cadence of new SRUs will be 6 weeks.
If you go from CPU to CPU3, nothing changes. There is one every quarter as before.
