Hi, Just an update... we changed the disk_access_mode to mmap_index_only and the memory problem disappeared. However, we did NOT confirm yet, the exact affect on performance, but in general acceptable so far, it could due to the fact that its not optimized anyways yet, since we just started using 2.2.1 recently.
We also had to add this to cassandra.yaml file index_summary_resize_interval_in_minutes=-1 after issues with automatic compaction CASSANDRA-10270 If any one has any feedback on this or on windows configuration or cassandra configuration on windows, it would be mush appreciated. Thanks, On Wed, Oct 28, 2015 at 1:57 PM, Alaa Zubaidi (PDF) <alaa.zuba...@pdf.com> wrote: > Thanks Rob, > We are using 7GB JVM on a 32GB RAM VM > Alaa > > On Wed, Oct 28, 2015 at 11:18 AM, Robert Coli <rc...@eventbrite.com> > wrote: > >> On Tue, Oct 27, 2015 at 8:47 PM, Alaa Zubaidi (PDF) <alaa.zuba...@pdf.com >> > 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 >> >> > > > > -- > > Alaa Zubaidi > PDF Solutions, Inc. > 333 West San Carlos Street, Suite 1000 > San Jose, CA 95110 USA > Tel: 408-283-5639 > fax: 408-938-6479 > email: alaa.zuba...@pdf.com > > -- Alaa Zubaidi PDF Solutions, Inc. 333 West San Carlos Street, Suite 1000 San Jose, CA 95110 USA Tel: 408-283-5639 fax: 408-938-6479 email: alaa.zuba...@pdf.com -- *This message may contain confidential and privileged information. If it has been sent to you in error, please reply to advise the sender of the error and then immediately permanently delete it and all attachments to it from your systems. If you are not the intended recipient, do not read, copy, disclose or otherwise use this message or any attachments to it. The sender disclaims any liability for such unauthorized use. PLEASE NOTE that all incoming e-mails sent to PDF e-mail accounts will be archived and may be scanned by us and/or by external service providers to detect and prevent threats to our systems, investigate illegal or inappropriate behavior, and/or eliminate unsolicited promotional e-mails (“spam”). If you have any concerns about this process, please contact us at * *legal.departm...@pdf.com* <legal.departm...@pdf.com>*.*
