Hi @Kant Kodali, We have multiple clusters running zing .
One cluster has 11/11 and another one also has 11/11.(190 GB mem,6TB hard disk and 16 Physical core machines) The average read size is around 200KB and it can go upto 6 MB. We are using g1GC in most clusters with 26GB heap and extra threads given to parallel and old gen collection. Those clusters 99% is also under 5 ms and doing good. We used Zing to remove all timeouts . If application is not having that requirement G1GC is good. with g1gGC i have seen average 200-300 ms min pauses every 4 minutes and 600 ms pauses every 6 hours and 99% latency is under 5-10 ms for most of the clusters having 10- 100 KB of read data. Regards Hari ________________________________ From: Kant Kodali <k...@peernova.com> Sent: Saturday, November 26, 2016 8:39:01 PM To: user@cassandra.apache.org Subject: Re: Java GC pauses, reality check @Harikrishnan Pillai: How many nodes you guys are running? and what is an approximate read size and an approximate write size? On Fri, Nov 25, 2016 at 7:32 PM, Harikrishnan Pillai <hpil...@walmartlabs.com<mailto:hpil...@walmartlabs.com>> wrote: We are running azul zing in prod with 1 million reads/s and 100 K writes/s with azul .we never had a major gc above 10 ms . Sent from my iPhone > On Nov 25, 2016, at 3:49 PM, Martin Schr?der > <mar...@oneiros.de<mailto:mar...@oneiros.de>> wrote: > > 2016-11-25 23:38 GMT+01:00 Kant Kodali > <k...@peernova.com<mailto:k...@peernova.com>>: >> I would also restate the following sentence "java GC pauses are pretty much >> a fact of life" to "Any GC based system pauses are pretty much a fact of >> life". >> >> I would be more than happy to see if someone can counter prove. > > Azul disagrees. > https://www.azul.com/products/zing/pgc/ > > Best > Martin
