Put your commitlog on a different device than the data files.
On Tue, Aug 3, 2010 at 10:46 PM, Mingfan Lu wrote:
> Hi,
> I have a 4-node cassandra cluster. And I find when the 4 nodes are
> flushing memtable and gc at the very similar moment, the throughput
> will drop and latency will increase
I think you can download the log files now.
I am using mmap, at the same time, I use hugepages, so that the jvm
heap won't be swapped out, I also swapoff my swap partition According
to the
https://issues.apache.org/jira/browse/CASSANDRA-1214.
I enlarge the memtable threshold I want to reduce the fr
Just guessing here, but your mem table settings are very high compared to the defaults (64MB and 0.3 Million). It may be that flushing 1GB of mem table data is taking a while. You may also want to look at the FlushDataBufferSizeInMB and FlushIndexBufferSizeInMB settings in storage-conf.xml.Is the
Hi,
I have a 4-node cassandra cluster. And I find when the 4 nodes are
flushing memtable and gc at the very similar moment, the throughput
will drop and latency will increase rapidly and the nodes are dead and
up frequently
You could download the IOPS variance of data disk (sda here) and
sy
