> Hpw does one set/get the read-concurrency? Also which read-concurrency, for > which pool? According to the threads tab in jconsole read-concurrency could > be among different pools. There are row-read-stag threads, lots of write > threads, row mutation stage etc.
Short version: Ignoremy concurrency speculation as it doesn't apply. Long version: I meant the ConcurrentReads settings in storage-conf.xml/cassandra.yaml (depending on version), but I was speculating. Having a look now, I presume it's not set to 1 because a minimum of 2 seems to be required (DatabaseDescriptor.java). And since you ask where I suspect it's at its default value of 8 anyway. Also, looking at StageManager it appears this is applied to ROW-READ-STAGE so is indeed unrelated to MESSAGE-DESERIALIZER-POOL. MESSAGE-DESERIALIZER-POOL seems to be unrelated to disk I/O alltogether and seems to be used by MessagingService.java. So - please ignore my read concurrency speculation as it doesn't apply. -- / Peter Schuller
