On Tue, Oct 27, 2015 at 8:47 PM, Alaa Zubaidi (PDF) <[email protected]> wrote:
> We have Cassandra 2.2.1 on Windows 2008R2-64-bit. > > We are noticing that during compaction Cassandra consumes all the > available memory for the VM and bring the VM to a crawl. compaction > settings are default, and we are using sized tiered compaction. > > When investigating this, we find through VMMAP that the memory is consumed > by mapped files. > These are almost all the sstables (index and data) for all keyspaces, > mapped into memory (system and user defined keyspaces) . > > Is this normal, or should these files not be mapped into memroy after > compaction? > https://wiki.apache.org/cassandra/FAQ#mmap However that is probably not really your problem, you probably just have too small of a heap if GC is failing? =Rob
