Hi Hari Could you share your G1GC settings please?
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 >> > > -- Cheers Bill
