53 lines
1.9 KiB
Plaintext
53 lines
1.9 KiB
Plaintext
[[indices-optimize]]
|
|
== Optimize
|
|
|
|
The optimize API allows to optimize one or more indices through an API.
|
|
The optimize process basically optimizes the index for faster search
|
|
operations (and relates to the number of segments a Lucene index holds
|
|
within each shard). The optimize operation allows to reduce the number
|
|
of segments by merging them.
|
|
|
|
[source,js]
|
|
--------------------------------------------------
|
|
$ curl -XPOST 'http://localhost:9200/twitter/_optimize'
|
|
--------------------------------------------------
|
|
|
|
[float]
|
|
=== Request Parameters
|
|
|
|
The optimize API accepts the following request parameters:
|
|
|
|
[cols="<,<",options="header",]
|
|
|=======================================================================
|
|
|Name |Description
|
|
|max_num_segments |The number of segments to optimize to. To fully
|
|
optimize the index, set it to `1`. Defaults to simply checking if a
|
|
merge needs to execute, and if so, executes it.
|
|
|
|
|only_expunge_deletes |Should the optimize process only expunge segments
|
|
with deletes in it. In Lucene, a document is not deleted from a segment,
|
|
just marked as deleted. During a merge process of segments, a new
|
|
segment is created that does not have those deletes. This flag allow to
|
|
only merge segments that have deletes. Defaults to `false`.
|
|
|
|
|flush |Should a flush be performed after the optimize. Defaults to
|
|
`true`.
|
|
|
|
|wait_for_merge |Should the request wait for the merge to end. Defaults
|
|
to `true`. Note, a merge can potentially be a very heavy operation, so
|
|
it might make sense to run it set to `false`.
|
|
|=======================================================================
|
|
|
|
[float]
|
|
=== Multi Index
|
|
|
|
The optimize API can be applied to more than one index with a single
|
|
call, or even on `_all` the indices.
|
|
|
|
[source,js]
|
|
--------------------------------------------------
|
|
$ curl -XPOST 'http://localhost:9200/kimchy,elasticsearch/_optimize'
|
|
|
|
$ curl -XPOST 'http://localhost:9200/_optimize'
|
|
--------------------------------------------------
|