ES 6.8.2 Search slow when response payload > 1 MB

Elastic Stack Elasticsearch
1

Hi everyone, I was wondering if anyone has encountered this error.

Upgraded from 6.5.2 to 6.8.2 and noticed our queries were running slow.

Using insomnia to test Elasticsearch I was running some queries and noticed that when the response content was > 1MB, the query would take about 5s.

I reduced the fields using

"_source": { "excludes": [ "campaigns", "suggestor" ] },

to significantly reduce the payload and now my queries take about 237ms.

I'm on AWS using a T3.small server.

This is probably a misconfiguration somewhere as nothing else has changed. Is there something blatantly obvious that I'm missing.

Thanks

2

I'd like to mention that that exact same query on the 6.5.2 ES cluster is about 200ms even if the response payload > 1 MB. (2.4MB in this case)

3

T3 instances have very limited CPU which means processing large queries can starve the instance if cup resources which can delay things. I would recommend using a m5 instead.

4

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