Kibana version: 5.4
Elasticsearch version: 5.4
Server OS version: SLES 12 x64
Browser version: Chrome
Browser OS version: Windows 7
Original install method (e.g. download page, yum, from source, etc.): Download page
Reference issue: #10132
Description of the problem including expected versus actual behavior:
I'm trying to visualise data with heatmap. If I set in aggrigation show me top 6 terms in X-Axis and top 8 terms on the Y-Axis then I recive message "There are too many series defined"

Steps to reproduce:
I ran into this issue in a few use cases
My workstation has 20 cores / 40 hyperthreads.
I am using metricbeat and wanted to show per-core CPU utilization over time. I can show up to 10 items, but I have 40 cores I'd like to show.

Hockey teams have more than 10 players. I'd like to show a roster sheet of players and statistics (statistics being goals, assists, penalties, etc)
I'm hitting this as well. My use-case is trying to dsiplay a heat-map of temperatures from many different locations over a dynamic but not huge range (i.e., temperature). I have the following:

It seems that currently there is no other visualisation on offer to display dense data in a readable fashion?
馃憤
Same issue here: Have 20+ buckets on the y-axis and getting the same message (There are too many series defined). Is there a maximum number of (sub) buckets?
Kibana 6.4.3 here
Version: 6.5.4
still broken
+1,
Version: 6.7.0
Can someone specify what the maximums are? You would think the visualization wouldn't let us choose 1000+ max terms if it breaks at 25.
Version: 7.1
still broken
The number of bucket here is currently limited to 25. We will increase it and make in configureable via Advanced Configuration
Most helpful comment
The number of bucket here is currently limited to 25. We will increase it and make in configureable via Advanced Configuration