What data are cached exactly in filter cache?

Elastic Stack Elasticsearch
1

is it the set of keys, e.g, the unique identifiers, which corresponds to
exactly the set of documents that match the filter?
Thanks,

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2

Its the set of documents that match the filter. Its cached per segment
which are immutable so they can be effectively kept until the segment is
removed or you run out of space in the cache. I believe the filter cache
stores instances of Accountable
https://lucene.apache.org/core/4_10_0/core/org/apache/lucene/util/Accountable.html
Bits
https://lucene.apache.org/core/4_10_0/core/org/apache/lucene/util/Bits.html
.

Nik

On Mon, Nov 24, 2014 at 8:39 PM, Jinyuan Zhou zhou.jinyuan@gmail.com
wrote:

is it the set of keys, e.g, the unique identifiers, which corresponds to
exactly the set of documents that match the filter?
Thanks,

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3

Thanks Nikolas,
That's a lot of memory to use.

Jinyuan (Jack) Zhou

On Mon, Nov 24, 2014 at 6:09 PM, Nikolas Everett nik9000@gmail.com wrote:

Its the set of documents that match the filter. Its cached per segment
which are immutable so they can be effectively kept until the segment is
removed or you run out of space in the cache. I believe the filter cache
stores instances of Accountable
https://lucene.apache.org/core/4_10_0/core/org/apache/lucene/util/Accountable.html
Bits
https://lucene.apache.org/core/4_10_0/core/org/apache/lucene/util/Bits.html
.

Nik

On Mon, Nov 24, 2014 at 8:39 PM, Jinyuan Zhou zhou.jinyuan@gmail.com
wrote:

is it the set of keys, e.g, the unique identifiers, which corresponds to
exactly the set of documents that match the filter?
Thanks,

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