[SOLVED] Upgrade elasticsearch 2.3.3 to 5.0.1 request too low

Elastic Stack Elasticsearch
1

Hi all,

Since I've upraged ELK from 2.3.3 to 5.0.1, when I make a search request in Kibana, it is very low.

I try to figure out why.

In my elasticsearch configuration, I have these inputs:

thread_pool:
    search:
        size: 13
        queue_size: 12000

When I try to see some old visualization I get this warning (there is a connection ? ):

Courier Fetch: 140 of 620 shards failed.

If you have any advice regarding this performance issue, please let me know.

Regards,
Alex

2

Check your ES logs, it should state why the fetch faild.

That is not a good idea.

3

Thanks for your answer.

Can you explain why ?

Thanks,
Alex

4

Glad you asked for clarification. :sunglasses:

My experience so far is that tuning the configuration is a bit of a mystic art. I have not had much success trying to figure out how to improve the index performance (ES5 Indexing performance (seems slow)).

5

Threadpools are stored in memory, by dramatically increasing the size you risk OOM. Also 12K requests might take a while to process, what do your clients do in the meantime?

6

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