Reindexing Performance

Elastic Stack Elasticsearch
1

Hi,

We are having problems with reindexing our data. Can you advice what to do on how to reindex while not affecting search speed of other indices? reindexing takes alot of resource.

Thanks!

2

you could use the requests_per_second parameter of the reindex request to controll how much documents are reindexed per second.
(https://www.elastic.co/guide/en/elasticsearch/reference/current/docs-reindex.html#_url_parameters_3)
That will logically reduce the speed of the reindexing

POST _reindex?wait_for_completion=false&requests_per_second=3000&refresh=true
{
  "source": {
    "index": "test-2018.01"
  },
  "dest": {
    "index": "test-2018"
  }
}
2 Likes
3

Hi Shaoranlaos, thank you very much! Will try this out :slight_smile:

4

Hi Shao,

I have another concern, after re indexing, how can we throttle populating the replica shards? because this also takes resource and affects our search performance.

5

sorry i haven't found anything for this
i myself work only with one node so this was never a concern

6

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