unacomn

@MorriganR Thanks. I was looking in the options to see if something like this was implemented, but I didn't know what it would be called. It's only usable if we'd...

@weca-theo According to Dbeaver, the connections are idle, not actively used, but they are still counted as connections towards the maximum number allowed by PostgreSQL while the project is opened,...

@weca-theo A large project is about 105 geometry layers stored in the database (about 10 more are duplicates with different filtering and symbology) and about 30 dictionaries in the same...

@vcloarec I can confirm that the fix works in 3.32.1. With parallel layer loading active the number of database connections remains small:  Things are back to normal, which is...

@agiudiceandrea I have tested with a new profile and on different machines, with AMD and Intel CPUs. Note that this is a Windows specific issue. It does not occur on...

This issue seems to have been resolved in QGIS 3.34. I'm not sure what particular changed fixed this, but there is no more hanging when changing symbology from that particular...