If you're looking for logging like "get keyX with CL quorum and slice Y took n millis" there's nothing like that from what I could find. We had to modify c* source (CassandraServer.java) to add this query logging to the thrift codepath. On May 18, 2013 3:20 PM, "Tomàs Núnez" <tomas.nu...@groupalia.com> wrote:
> Yes, I read how to do that here, as well: > http://www.datastax.com/docs/1.1/configuration/logging_options > > But I didn't know what classes to enable logging for the queries... Is > there any document with the list of classes with a bit explanation for each > of them? I can't find any, and I don't understand java enough to dive > through the code.... > > Thanks! > > > 2013/5/17 aaron morton <aa...@thelastpickle.com> > >> And... could I be more precise when enabling logging? Because right now, >> with *log4j.rootLogger=DEBUG,stdout,R* I'm getting a lot of information >> I won't use ever, and I'd like to enable just what I need to see gets and >> seds…. >> >> >> see the example at the bottom of this file about setting the log level >> for a single class >> https://github.com/apache/cassandra/blob/trunk/conf/log4j-server.properties >> >> You probably want to set it for the >> org.apache.cassandra.thrift.CassandraServer class. But I cannot remember >> what the logging is like in 0.8. >> >> Cassandra gets faster in the later versions, which normally means doing >> less work. Upgrading to 1.1 would be the first step I would take in >> improving performance. >> >> Cheers >> >> ----------------- >> Aaron Morton >> Freelance Cassandra Consultant >> New Zealand >> >> @aaronmorton >> http://www.thelastpickle.com >> >> On 18/05/2013, at 4:00 AM, Tomàs Núnez <tomas.nu...@groupalia.com> wrote: >> >> Hi! >> >> For quite time I've been having some unexpected loadavg in the cassandra >> servers. I suspect there are lots of uncontrolled queries to the cassandra >> servers causing this load, but the developers say that there are none, and >> the load is due to cassandra internal processes. >> >> Trying to get to the bottom, I've been looking into completed ReadStage >> and MutationStage through JMX, and the numbers seem to confirm my theory, >> but I'd like to go one step forward and, if possible, list all the queries >> from the webservers to the cassandra cluster (just one node would be >> enough). >> >> I've been playing with cassandra loglevels, and I can see when a Read or >> a Write is done, but it would be better if I could knew the CF of the >> query. For my tests I've put the in the log4j.server >> " log4j.rootLogger=DEBUG,stdout,R", writing and reading a test CF, and I >> can't see the name of it anywhere. >> >> For the test I'm using Cassandra 0.8.4 (yes, still), as my production >> servers, and also 1.0.11. Maybe this changes in 1.1? Maybe I'm doing >> something wrong? Any hint? >> >> And... could I be more precise when enabling logging? Because right now, >> with *log4j.rootLogger=DEBUG,stdout,R* I'm getting a lot of information >> I won't use ever, and I'd like to enable just what I need to see gets and >> seds.... >> >> Thanks in advance, >> Tomàs >> >> >> > >
