Re: Many ParNew collections

2012-09-17 Thread Rene Kochen
Thanks Aaron, I found the problem. It's in this thread: "minor compaction and delete expired column-tombstones". The problem was that I have one big row called "Index" which contains many tombstones. Reading all these tombstones caused the memory issues. I think node 1 and 3 have had enough mino

Re: Many ParNew collections

2012-09-14 Thread Rene Kochen
Thanks Aaron, At another production site the exact same problems occur (also after ~6 months). Here I have a very small cluster of three nodes with replication factor = 3. One of the three nodes begins to have many long Parnews and high CPU load. I upgraded to Cassandra 1.0.11, but the GC problem