Re: High GC activity and OOMs

almost all of available heap size, so pretty easy > to cause OOM:s by throwing traffic on it. > > -- > / Peter Schuller (@scode, http://worldmodscode.wordpress.com) -- Dipl.-Inform. Günter Ladwig Karlsruhe Institute of Technology (KIT) Institute AIFB Englerstraße 11 (Building 11.40,

High GC activity and OOMs

is larger than space used because of the compression.) While I don't see OOMs when I use only a single thread to page the row, there are lots of ParNew collections that take about 500ms each and also many full collections. Do I just not have enough RAM? Cheers, Günter -- Dipl.-Inform

Re: nodetool cfstats on 1.0.0-rc1 throws an exception

ne yet. Cheers, Günter On 12.10.2011, at 16:28, Jonathan Ellis wrote: > Try scrubbing the CF ("nodetool scrub") and see if that fixes it. > > If not, then at least we have a reproducible problem. :) > > On Tue, Oct 11, 2011 at 4:43 PM, Günter Ladwig wrote: >> Hi all,

Re: nodetool cfstats on 1.0.0-rc1 throws an exception

Yes, all three use SnappyCompressor. On 12.10.2011, at 02:58, Jonathan Ellis wrote: > Are all 3 CFs using compression? > > On Tue, Oct 11, 2011 at 4:43 PM, Günter Ladwig wrote: >> Hi all, >> >> I'm seeing the same problem on my 1.0.0-rc2 cluster. However,

Re: nodetool cfstats on 1.0.0-rc1 throws an exception

x.mbeanserver.JmxMBeanServer.getAttribute(JmxMBeanServer.java:638) >> >> > at >> >> > >> >> > javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1404) >> >> > at >> >> > >> >

"Insufficient space" on 1.0.0-rc2 when compacting compressed CFs

ize to check whether there is enough space or not? I estimate that the data is compressed by a factor of about 3x. Cheers, Günter -- Dipl.-Inform. Günter Ladwig Karlsruhe Institute of Technology (KIT) Institute AIFB Englerstraße 11 (Building 11.40, Room 250) 76131 Karlsruhe, Germany Phone: +49

Re: Storing single rows on multiple nodes

. Actually, I hope that Cassandra itself will at some point take care of compression ;) Another problem is that you can't actually just increase cluster size to scale to larger datasets, because the constraint is the disk space on single nodes. Cheers, Günter > > On Sat, Jul 9, 201

Storing single rows on multiple nodes

[2] should be implemented. Cheers, Günter [1] http://wiki.apache.org/cassandra/CassandraLimitations [2] Byers at el.: Simple Load Balancing for Distributed Hash Tables, http://www.springerlink.com/content/r9r4qcqxc2bmfqmr/ -- Dipl.-Inform. Günter Ladwig Karlsruhe Institute of Techn