you need to look at nodetool compactionstats - there is probably a big L0 -> L1 compaction going on that blocks other compactions from starting
On Tue, Apr 21, 2015 at 1:06 PM, Anishek Agarwal <anis...@gmail.com> wrote: > the "some_bits" column has about 14-15 bytes of data per key. > > On Tue, Apr 21, 2015 at 4:34 PM, Anishek Agarwal <anis...@gmail.com> > wrote: > >> Hello, >> >> I am inserting about 100 million entries via datastax-java driver to a >> cassandra cluster of 3 nodes. >> >> Table structure is as >> >> create keyspace test with replication = {'class': >> 'NetworkTopologyStrategy', 'DC' : 3}; >> >> CREATE TABLE test_bits(id bigint primary key , some_bits text) with >> gc_grace_seconds=0 and compaction = {'class': 'LeveledCompactionStrategy'} >> and compression={'sstable_compression' : ''}; >> >> have 75 threads that are inserting data into the above table with each >> thread having non over lapping keys. >> >> I see that the number of pending tasks via "nodetool compactionstats" >> keeps increasing and looks like from "nodetool cfstats test.test_bits" has >> SSTTable levels as [154/4, 8, 0, 0, 0, 0, 0, 0, 0], >> >> Why is compaction not kicking in ? >> >> thanks >> anishek >> > >