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From Stanislav Lukyanov <stanlukya...@gmail.com>
Subject Re: Drop index do not release memory used ?
Date Fri, 01 Nov 2019 12:08:26 GMT

What version do you use?
There was an issue with recycling pages between data and indexes which has
been fixed in 2.7 https://issues.apache.org/jira/browse/IGNITE-4958.
In AI 2.7 and later this should be working fine.


On Sat, Oct 26, 2019 at 5:22 PM yann Blazart <yann.blazart@gmail.com> wrote:

> Yes the data pages in reuse list are reused for new objects.
> If you drop table, you get back all pages used in reuse list.
> But it seems that it's not true for drop indexes
> Le sam. 26 oct. 2019 à 16:18, Andrey Dolmatov <itdolmatov@gmail.com> a
> écrit :
>> Ignite believe that Ignite will reuse that memory. But it is a question,
>> does Ignite reuse index data blocks for data blocks.
>> On Fri, Oct 25, 2019, 15:28 yann.blazart@externe.bnpparibas.com <
>> yann.blazart@externe.bnpparibas.com> wrote:
>>> Hello all.
>>> If you can remember, I found a way to compute the real size of memory
>>> used in offheap, using the reuselist size.
>>> As I'm facing some limits on my hardware, I'm trying to optimize my
>>> memory consumption, in pure memory, no persistence on hdd or ssd.
>>> For that as I have to execute plenty of request on my stored data, I saw
>>> that indexes consumes a lot of memory.
>>> To improve that, in my algorithm I tried to create tables with only pk,
>>> no indexes at first.
>>> Then before each request, I tried to create indexes , execute request,
>>> then drop indexes.
>>> What I see, is that drop index do not release memory...
>>> Everything is release only when we drop table.
>>> Is this normal  ?
>>> Thnaks and regards.
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