Does using a script in elastic output plugin for Logstash impact's performance

[Rahul_Goyal]

Hi,

I am trying to insert data from multiple Kafka topics to ES. However, there are scenarios where I need to append message in an existing array or update message in multiple JSON documents, for which I am using the "script" in the ES output plugin.

I wanted to know does it impact the overall performance, for the JSON to be processed by logstash, thereafter indexed and updates available in ES index.

Thanks,
Rahul

[Christian_Dahlqvist]

Yes, an update is always more costly than indexing a new document where Elasticsearch sets the id.