Re: How does Ignite garbage collect unused pages?
Thanks! On Thu, Jun 14, 2018 at 2:00 AM, Alexey Goncharuk < alexey.goncha...@gmail.com> wrote: > John, > > The page is moved between FreeList buckets synchronously during the > corresponding cache entry update, so it is the part of cache.put() or > cache.remove() operation. > > ср, 13 июн. 2018 г. в 2:32, Denis Magda : > > > 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 > > 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 > 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, > > > > > > > > > > > > > > >
Re: How does Ignite garbage collect unused pages?
John, The page is moved between FreeList buckets synchronously during the corresponding cache entry update, so it is the part of cache.put() or cache.remove() operation. ср, 13 июн. 2018 г. в 2:32, Denis Magda : > 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 > 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 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 > > > wrote: > > > > > > > Hi, > > > > > > > > How does Ignite free unused pages? Is there some kind of background > > > thread > > > > process that scans unused pages? > > > > > > > > Thanks, > > > > > > > > > >
Re: How does Ignite garbage collect unused pages?
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 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 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 > > wrote: > > > > > Hi, > > > > > > How does Ignite free unused pages? Is there some kind of background > > thread > > > process that scans unused pages? > > > > > > Thanks, > > > > > >
Re: How does Ignite garbage collect unused pages?
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 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 > wrote: > > > Hi, > > > > How does Ignite free unused pages? Is there some kind of background > thread > > process that scans unused pages? > > > > Thanks, > > >
Re: How does Ignite garbage collect unused pages?
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 wrote: > Hi, > > How does Ignite free unused pages? Is there some kind of background thread > process that scans unused pages? > > Thanks, >
How does Ignite garbage collect unused pages?
Hi, How does Ignite free unused pages? Is there some kind of background thread process that scans unused pages? Thanks,
