RE: Looking for feedback on automated root-cause system

2019-02-24 Thread Kenneth Brotman
Sounds like a promising step forward. I’d certainly like to know when the blog posts are up. Kenneth Brotman From: Matt Stump [mailto:mrevilgn...@gmail.com] Sent: Friday, February 22, 2019 7:56 AM To: user Subject: Re: Looking for feedback on automated root-cause system For some

RE: tombstones threshold warning

2019-02-24 Thread Kenneth Brotman
Hi Ayub, The counting of tombstones is sort of involved. The JIRA tickets contain the discussions and where things are at. Several tickets to study. Maybe start with CASSANDRA-14149: https://issues.apache.org/jira/browse/CASSANDRA-14149 and follow the discussions back to previous

Re: Tombstones in memtable

2019-02-24 Thread Jeff Jirsa
Given your data model, there’s two ways you may read a tombstone: You select an expired row, or you scan the whole table. If you select an expired row, you’re going to scan one tombstone. With sufficiently high read rate, that’ll look like you’re scanning a lot - each read will add one to the

Re: Tombstones in memtable

2019-02-24 Thread Rahul Reddy
Thanks Jeff. I'm trying to figure out why the tombstones scans are happening if possible eliminate it. On Sat, Feb 23, 2019, 10:50 PM Jeff Jirsa wrote: > G1GC with an 8g heap may be slower than CMS. Also you don’t typically set > new gen size on G1. > > Again though - what problem are you