@Harikrishnan Pillai Thanks for that. What about the following?
"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". *So with G1GC you are able get under 5ms not the C4 (Zing's Garbage Collector?)* *What timeouts are you referring to ?* On Mon, Nov 28, 2016 at 7:39 AM, Harikrishnan Pillai < hpil...@walmartlabs.com> wrote: > Hi @Kant Kodali, > > 11 /11 , 11 nodes in DC1 and 11 nodes in DC2. > > > ------------------------------ > *From:* Kant Kodali <k...@peernova.com> > *Sent:* Monday, November 28, 2016 6:56 AM > > *To:* user@cassandra.apache.org > *Subject:* Re: Java GC pauses, reality check > > Hi Hari, > > I am a little bit confused. > > What you mean 11/11 ? > > "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". So with G1GC you are able get under 5ms not the C4 > (Zing's Garbage Collector?) > > What timeouts are you referring to here? > > Thanks, > kant > > On Sun, Nov 27, 2016 at 9:57 PM, Harikrishnan Pillai < > hpil...@walmartlabs.com> wrote: > >> 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> 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 Schröder <mar...@oneiros.de> >>> wrote: >>> > >>> > 2016-11-25 23:38 GMT+01:00 Kant Kodali <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 >>> >> >> >
