Hi Steve, I think that you can get a performance hit for your write operations by disabling the WAL. It serves two purposes in Ignite. The first is the recovery while the second is fast disk writes. The WAL is an append-only structure and Ignite can persist changes to disk really quick. If the WAL is disabled then it will take more time to update persistence files on disk.
Just in case, if you missed that point, once the persistence is enabled Ignite will keep 100% of records on disk. It's not like a OS swap process that kicks in only when you're running out of memory space. Usually, we recommend disabling the WAL during a loading phase: https://apacheignite.readme.io/docs/write-ahead-log#section-wal-activation-and-deactivation In general, I would certainly keep the WAL enabled but disabled the WAL archiving if the recovery is not a big deal for you: https://apacheignite.readme.io/docs/write-ahead-log#disabling-wal-archiving - Denis On Tue, Jun 16, 2020 at 10:50 AM steve.hostettler < steve.hostett...@gmail.com> wrote: > Hello, > > I am trying to use ignite persistence to "extend" memory. That is to > replace > the swap that is not working very well. > > Therefore since I do not care about recovery I disabled the WAL. Are there > other things you would recommend to configure to use the ignite persistence > as a sort of swap. For instance only persisting the less used pages most of > the time. > > Thanks > > Steve > > > > -- > Sent from: http://apache-ignite-users.70518.x6.nabble.com/ >
