There is a similar thread here.
We’re aware that OJS/OMP/OPS 3.5.0-3 do not currently perform well with large submission lists; there have already been some improvements since 3.5.0-2, but more work needs to be done before we’ll be comfortable adding the LTS stamp to the 3.5.0-x branch.
The good news is that structurally the software is written well to perform better than previous branches. However, there is a gremlin hiding in the complex submission list code that we haven’t been able to find and evict yet.
(I’ve filed this as Improve submission list performance · Issue #12293 · pkp/pkp-lib · GitHub so you have something to watch, but was already on our radar.)
Thanks,
Alec Smecher
Public Knowledge Project Team