Thanks Erick.
Our JVM options are unchanged between 2.2 and 3.11, and we have disk access mode set to standard. Generally we’ve maintained all configuration between the two versions. Read throughput (rate, bytes read/range scanned, etc.) seems fairly consistent before and after the upgrade across all nodes. Leon On Wed, Oct 28, 2020 at 12:01 AM Erick Ramirez <erick.rami...@datastax.com> wrote: > I haven't seen this specific behaviour in the past but things that I would > look at are: > > - JVM options which differ between 3.11 defaults and what you have > configured in 2.2 > - review your monitoring and check read throughput on the upgraded > node as compared to 2.2 nodes > - possibly not have disk access mode set to map index files only (not > directly related to long GC pauses) > > If you're interested, I've written a post about disk access mode here -- > https://community.datastax.com/questions/6947/. Cheers! > >>
