Whenever you add or remove an entry, it changes the size of a page which can lead to page movement between free list. According to this page, the page defragmentation/compaction happens in the background and when a threshold is met: https://apacheignite.readme.io/docs/memory-defragmentation
Hope Ignite persistence experts can shine more light on this. -- Denis On Tue, Jun 12, 2018 at 3:12 PM John Wilson <sami.hailu...@gmail.com> wrote: > thanks. But *when* does that happen - i.e. when is the decision made to > move pages? Is this part of the cache.put path or a separate thread? > > On Tue, Jun 12, 2018 at 1:03 PM, Denis Magda <dma...@apache.org> wrote: > > > A page is moved between free lists that used to track pages of similar > free > > space left: > > > https://apacheignite.readme.io/docs/memory-architecture#section-free-lists > > > > -- > > Denis > > > > > > On Tue, Jun 12, 2018 at 12:35 PM John Wilson <sami.hailu...@gmail.com> > > wrote: > > > > > Hi, > > > > > > How does Ignite free unused pages? Is there some kind of background > > thread > > > process that scans unused pages? > > > > > > Thanks, > > > > > >
