No mapper service and index caches for replicated closed indices #40423
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
ywelsch
added
>enhancement
:Distributed/Distributed
|
Pinging @elastic/es-distributed |
ywelsch
added a commit
that referenced
this pull request
Mar 27, 2019
) Replicated closed indices can't be indexed into or searched, and therefore don't need a shard with full indexing and search capabilities allocated. We can save on a lot of heap memory for those indices by not allocating a mapper service and caching infrastructure (which preallocates a constant amount per instance). Before this change, a 1GB ES instance could host 250 replicated closed metricbeat indices (each index with one shard). After this change, the same instance can host 7300 replicated closed metricbeat instances (not that this would be a recommended configuration). Most of the remaining memory is in the cluster state and the IndexSettings object.
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Replicated closed indices can't be indexed into or searched, and therefore don't need a shard with full indexing and search capabilities allocated. We can save on a lot of heap memory for those indices by not allocating a mapper service and caching infrastructure (which preallocates a constant amount per instance). Before this change, a 1GB ES instance could host 250 replicated closed metricbeat indices (each index with one shard). After this change, the same instance can host 7300 replicated closed metricbeat instances (not that this would be a recommended configuration). Most of the remaining memory is in the cluster state and the
IndexSettingsobject.