Do you see different CPU/Memory utilization? Where do things differ? Client or server?
Thanks. -- Lars ----- Original Message ----- From: Ben West <[email protected]> To: "[email protected]" <[email protected]> Cc: Sent: Tuesday, January 17, 2012 11:25 AM Subject: HBase 0.92rc3 rest performance Hi all We're trying out .92rc3 instead of .90.4, and for the most part everything seems fine. But we have a simple test of REST performance which is basically a large number of cURL jobs getting random rows, and this test is running *a lot* slower under .92. When we run just a single client doing REST GETs, the performance is fine. But once I have dozens or hundreds of clients, performance is ~20x worse than under .90.4 (response time is 7-800ms instead of 40-50ms). YCSB has pretty much the same performance under both versions, as do other internal tools measuring Thrift and native performance, so I don't feel like this is a problem with HBase coresetup (although it could be). I don't see anything suspicious in any logs, IO and CPU utilization are both low. Has anyone run into this or have thoughts on how to troubleshoot? Thanks! Ben
