2014-12-05 15:40 GMT+08:00 Jonathan Haddad j...@jonhaddad.com:
I recommend reading through
https://issues.apache.org/jira/browse/CASSANDRA-8150 to get an idea of
how the JVM GC works and what you can do to tune it. Also good is Blake
Eggleston's writeup which can be found here:
There's a lot of factors that go into tuning, and I don't know of any
reliable formula that you can use to figure out what's going to work
optimally for your hardware. Personally I recommend:
1) find the bottleneck
2) playing with a parameter (or two)
3) see what changed, performance wise
If
On Thu, Dec 4, 2014 at 8:13 PM, Philo Yang ud1...@gmail.com wrote:
In each time Old Gen reduce only a little, Survivor Space will be clear
but the heap is still full so there will be another full gc very soon then
the node will down. If I restart the node, it will be fine without gc
trouble.
On Dec 4, 2014 8:14 PM, Philo Yang ud1...@gmail.com wrote:
Hi,all
I have a cluster on C* 2.1.1 and jdk 1.7_u51. I have a trouble with full
gc that sometime there may be one or two nodes full gc more than one time
per minute and over 10 seconds each time, then the node will be unreachable
and
I have two kinds of machine:
16G RAM, with default heap size setting, about 4G.
64G RAM, with default heap size setting, about 8G.
These two kinds of nodes have same number of vnodes, and both of them have
gc issue, although the node of 16G have a higher probability of gc issue.
Thanks,
Philo
I recommend reading through
https://issues.apache.org/jira/browse/CASSANDRA-8150 to get an idea of how
the JVM GC works and what you can do to tune it. Also good is Blake
Eggleston's writeup which can be found here:
http://blakeeggleston.com/cassandra-tuning-the-jvm-for-read-heavy-workloads.html
