+1 on the release, let's do it ASAP. On Thu, Aug 24, 2017 at 12:32 PM, Denis Magda <dma...@apache.org> wrote:
> Igniters, > > Presently every Apache Ignite node requests 80% of RAM from an operating > system. We debated a lot about this default [1] and as a practice shows > those who voted for the lower value (20%-25%) were right. > > Our users started reporting about bizarre issues ([2], [3], [4]) when a > cluster hangs, freezes for a while or even crashes during standard > preloading phase or minor workloads. > > It’s turned out to be that lack of RAM causes extensive swapping and > checkpointing activity. Even more, the issue can be reproduced on your > laptop if you launch a couple of nodes and start data preloading. > > All this can be avoided if you allocated less than 80% and tune the > checkpointing if the persistence is used. Unfortunately, only few could get > to this point, the rest would kick Ignite out from their deployments. > > Thus, we have to fix the defaults ([5] and [6]) on our own and release an > emergency release with the fixes as soon as possible. > > Any objections or other thoughts? > > [1] http://apache-ignite-developers.2346864.n4.nabble. > com/IGNITE-5717-improvements-of-MemoryPolicy-default-size-td20264.html > [2] http://apache-ignite-users.70518.x6.nabble.com/ > Performance-of-persistent-store-too-low-when-bulb- > loading-tp16247p16337.html > [3] http://apache-ignite-users.70518.x6.nabble.com/Strange- > problems-with-Ignite-native-Persistence-when-Data-exceeds- > Memory-td16187.html#a16194 > [4] http://apache-ignite-users.70518.x6.nabble.com/ > Activation-slow-and-Ignite-node-crashed-in-the-middle-of- > checkpoint-td16144.html > > [5] https://issues.apache.org/jira/browse/IGNITE-6003 > [6] https://issues.apache.org/jira/browse/IGNITE-6182 > > — > Denis
