Allow more control of index.merge.policy.deletes_pct_allowed #77270
Labels
:Distributed Indexing/Engine
Anything around managing Lucene and the Translog in an open shard.
>enhancement
Team:Distributed (Obsolete)
Meta label for distributed team (obsolete). Replaced by Distributed Indexing/Coordination.
Comments
n0othing
added
>enhancement
needs:triage
gwbrown
added
:Distributed Indexing/Engine
elasticmachine
added
the
Team:Distributed (Obsolete)
|
Pinging @elastic/es-distributed (Team:Distributed) |
jimczi
added a commit
to jimczi/elasticsearch
that referenced
this issue
Sep 9, 2021
This commit changes the es merge policy to apply the maximum segment size on force merges that only expunge deletes (forceMergeDeletes). This option is useful for read-write use cases that wants to reclaim deleted docs more aggressively than the `index.merge.policy.deletes_pct_allowed`. Relates elastic#77270
jimczi
added a commit
that referenced
this issue
Sep 14, 2021
…rge (#77478) This commit changes the es merge policy to apply the maximum segment size on force merges that only expunge deletes (forceMergeDeletes). This option is useful for read-write use cases that wants to reclaim deleted docs more aggressively than the `index.merge.policy.deletes_pct_allowed`. Closes #61764 Relates #77270
jimczi
added a commit
that referenced
this issue
Sep 14, 2021
…rge (#77478) (#77692) This commit changes the es merge policy to apply the maximum segment size on force merges that only expunge deletes (forceMergeDeletes). This option is useful for read-write use cases that wants to reclaim deleted docs more aggressively than the `index.merge.policy.deletes_pct_allowed`. Closes #61764 Relates #77270
|
We are also interested in this. We are currently scaling up our cluster based on disk usage and have spare CPU and would benefit from a value lower than 20%. |
|
Closing thanks to #93188! |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Uh oh!
There was an error while loading. Please reload this page.
Today, the default merge policy allows you to control the maximum percentage of deleted documents that is tolerated in an index via
index.merge.policy.deletes_pct_allowed. This value defaults to 33% and allows users to configure anywhere between 20% - 50%.The 20% floor is in place to avoid overwhelming nodes with excessive CPU usage and disk I/O. However, at scale, this 20% could translate to TBs of wasted space. Some users may have really performant hardware and be ok with trading extra CPU/disk I/O in exchange for more free disk space.
The text was updated successfully, but these errors were encountered: