Query latency spikes and Open search contexts

Elastic Stack Elasticsearch
1

Hi All,
Lately we are seeing latency spikes in production for our queries. We also see
a spike in the number of open search contexts ( it shoots to around 2000 from 400 ). We are using
ES 1.3.9 and it recovers on its own after about 5 minutes. There are no scan/scrolls being used,
so its surprising to see a spike in open search contexts...any clues on why this may be happening?

Thanks,
Madhav.

2

Are you monitoring things, eg with Marvel or something?
Have you checked your ES logs for GC or anything else?

Upgrade!

3

We are monitoring our ES closely...but so far haven't found much that would help. Any ideas on specific metrics to monitor are most welcome...

4

Incoming indexing and search requests would be two immediate ones.

Also, upgrade.

5

Thanks Mark!

We are considering upgrade path to 1.7.3 and then to 2.1.1. just curious, are there any changes with respect to search contexts in versions beyond 1.4.X?

Thanks,
Madhav.

6

There's a few when you hit 2.X, make sure you run the migration plugin and read breaking changes :slight_smile: