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Yury Vidineev commented on CASSANDRA-18541: ------------------------------------------- Thanks for the answer, [~smiklosovic] . Yes, from the [CASSANDRA-17812|https://issues.apache.org/jira/browse/CASSANDRA-17812] description that's exactly the issue I faced. Since we already fixed it on the client side - it's hard to reproduce, but I'll try. For now, I think we can close this issue. Thanks! > AUTH requests use too much resources > ------------------------------------ > > Key: CASSANDRA-18541 > URL: https://issues.apache.org/jira/browse/CASSANDRA-18541 > Project: Cassandra > Issue Type: Bug > Reporter: Yury Vidineev > Priority: Normal > Attachments: Screenshot_20230520_000633.png, > Screenshot_20230520_000654.png > > > Hello. I see unexpected CPU usage in a rare situation that may be worth > digging into. > We have C* 4.0.9 on Debian running on Java 11.0.18. > It's a small cluster of 3 nodes on commodity hardware (6 cores CPU, 32 Gb > RAM, 2 x 512 Gb SSD NVME). > This ring has about 35 clients using Datastax Java Driver for Apache > Cassandra. > In the driver connection settings, we use the following: > CONNECTION_POOL_LOCAL_SIZE = 400 > CONNECTION_POOL_REMOTE_SIZE = 100 > > And for some reason, from time to time, it causes hundreds of AUTH requests > per second that leads to an enormous CPU usage. > And yes, it's easy not to use these settings in the driver, leaving defaults > that don't produce such an amount of AUTHs. But isn't it weird that ~150 AUTH > rps consume ~1200% CPU? > Please see attached graphs. > I have the following in the settings: > authenticator: PasswordAuthenticator > authorizer: CassandraAuthorizer > roles_validity_in_ms: 600000 > permissions_validity_in_ms: 600000 > credentials_validity_in_ms: 600000 > Please let me know if I can provide any other necessary information. > Thanks for your work. Cassandra is amazing :) -- This message was sent by Atlassian Jira (v8.20.10#820010) --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@cassandra.apache.org For additional commands, e-mail: commits-h...@cassandra.apache.org