I think this could've been caused by https://issues.apache.org/jira/browse/CASSANDRA-15690 which was introduced on 3.11.7 and removed an optimization that may cause a correctness issue when there are partition deletions. I'd suggest you to open an issue at https://issues.apache.org/jira/projects/CASSANDRA/issues to call attention to this regression to see if there's anything that can be done when the workload has no partition deletions. Make sure to include details about your workload (schema, replication settings, CL, query, etc) to facilitate investigation.
Em qua., 2 de dez. de 2020 às 12:44, Nicolai Lune Vest < nicolai.v...@lancom.de> escreveu: > Hi, > > we performed a test run with 3.11.9. Unfortunately we do not experience a > difference regarding increased read latency at some of our tables. > > Do others experience the same or similar behavior and probably do have a > solution? > > Kind regards, > Nico > > -----"Nicolai Lune Vest" <nicolai.v...@lancom.de> schrieb: ----- > An: user@cassandra.apache.org > Von: "Nicolai Lune Vest" <nicolai.v...@lancom.de> > Datum: 06.11.2020 09:14 > Betreff: Antwort: Increased read latency with Cassandra >= 3.11.7 > > > > Hi, > > thanks for your interests! > > We use TWCS and LCS and see only TWCS effected by the update regarding > higher latencies (as well as increased SSTable reads and bloom filter false > positives). > > We did not update to 3.11.9 as of now but probably will give it a try > within the next two or tree weeks. I'll let you know about the results. > > Cheers > Nico > > -----"Jai Bheemsen Rao Dhanwada" <jaibheem...@gmail.com> schrieb: ----- > An: "user@cassandra.apache.org" <user@cassandra.apache.org> > Von: "Jai Bheemsen Rao Dhanwada" <jaibheem...@gmail.com> > Datum: 05.11.2020 17:36 > Betreff: Increased read latency with Cassandra >= 3.11.7 > > Hello Nicolai, > > > I am also looking to upgrade to 3.11.8. Is the latency you noticed is only > with TWCS? And others looks good? > > On Thursday, November 5, 2020, Ahmed Eljami <ahmed.elj...@gmail.com> > wrote: > > +1 > I would also be interested to know if the 3.11.9 provide any improvement > for your case. > Cheers. > > > > Le mer. 4 nov. 2020 à 14:53, Johannes Weißl <jar...@molb.org> a écrit : > > Hi Nico, > > On Mon, Sep 14, 2020 at 03:51PM +0200, Nicolai Lune Vest wrote: > > after upgrading my Cassandra nodes from version 3.11.6 to either > > 3.11.7 or 3.11.8 I experience a significant increase in read latency. > > Have you (or others) any update on that? Does the version 3.11.9 > released today provide any improvement? > > Thanks, > Johannes > > --------------------------------------------------------------------- > To unsubscribe, e-mail: user-unsubscr...@cassandra.apache.org > For additional commands, e-mail: user-h...@cassandra.apache.org > > > > > -- > > Cordialement; > > > Ahmed ELJAMI > > > > > > > > LANCOM Systems GmbH > Adenauerstr. 20 / B2 > 52146 Würselen > Deutschland > > Tel: +49 2405 49936-0 > Fax: +49 2405 49936-99 > > Web: https://www.lancom-systems.de > > > > Geschäftsführer: Ralf Koenzen, Stefan Herrlich > Sitz der Gesellschaft: Aachen, Amtsgericht Aachen, HRB 16976 > > > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: user-unsubscr...@cassandra.apache.org > For additional commands, e-mail: user-h...@cassandra.apache.org > >
