Re: really bad select performance

2012-04-05 Thread David Leimbach
entire index row to the node that > is queried. > > -Chris > > - Original Message - > From: "David Leimbach" > > To: user@cassandra.apache.org > Sent: Monday, April 2, 2012 8:51:46 AM > Subject: Re: really bad select performance > > > This is all very

Re: really bad select performance

2012-04-05 Thread Chris Hart
quot;David Leimbach" To: user@cassandra.apache.org Sent: Monday, April 2, 2012 8:51:46 AM Subject: Re: really bad select performance This is all very hypothetical, but I've been bitten by this before. Does row_loaded happen to be a binary or boolean value? If so the secondary index ge

Re: really bad select performance

2012-04-03 Thread Jonathan Ellis
Secondary indexes can generate a lot of random i/o. iostat -x can confirm if that's your problem. On Thu, Mar 29, 2012 at 5:52 PM, Chris Hart wrote: > Hi, > > I have the following cluster: > > 136112946768375385385349842972707284580 >  MountainViewRAC1        Up     Normal  1.86 GB         20.0

Re: really bad select performance

2012-04-02 Thread David Leimbach
This is all very hypothetical, but I've been bitten by this before. Does row_loaded happen to be a binary or boolean value? If so the secondary index generated by Cassandra will have at most 2 rows, and they'll be REALLY wide if you have a lot of entries. Since Cassandra doesn't distribute colum

Re: really bad select performance

2012-03-31 Thread aaron morton
Is there anything in the logs when you run the queries ? Try turning the logging up to DEBUG on the node that fails to return and see what happens. You will see it send messages to other nodes and do work itself. One thing to note, a query that uses secondary indexes runs on a node for each t

really bad select performance

2012-03-29 Thread Chris Hart
Hi, I have the following cluster: 136112946768375385385349842972707284580 MountainViewRAC1Up Normal 1.86 GB 20.00% 0 MountainViewRAC1Up Normal 2.17 GB 33.33% 56713727820156410577229101238628035242