# Maximum capacity for Heartbeat
**URL:** https://discuss.elastic.co/t/maximum-capacity-for-heartbeat/101021
**Category:** Beats
**Tags:** heartbeat
**Created:** [September 19, 2017, 12:27pm UTC](https://discuss.elastic.co/t/maximum-capacity-for-heartbeat/101021 "2017-09-19T12:27:47Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Rupesh\_Ranjan](https://discuss.elastic.co/u/Rupesh_Ranjan)
#### Post date: [September 19, 2017, 12:27pm UTC](https://discuss.elastic.co/t/maximum-capacity-for-heartbeat/101021/1 "2017-09-19T12:27:47Z")
I am using heartbeat version 5.3.0. I wanted to know if there a limit on number of services that it can monitor?
I see that latest release is 5.6.1(beta). Will the maximum capacity change with the version?
P.S. - I have almost 2000 services which i need to monitor.
---
### Author:  [@andrewkroh](https://discuss.elastic.co/u/andrewkroh)
#### Post date: [September 19, 2017, 1:16pm UTC](https://discuss.elastic.co/t/maximum-capacity-for-heartbeat/101021/2 "2017-09-19T13:16:19Z")
Heartbeat is not yet [GA](https://github.com/elastic/beats/issues/3952). Since 5.3 there have been a few changes to the event structure, but I don't think any changes that affect "capacity". Network throughput for the machine and the maximum number of open FDs are probably the limiting factors.
I would check the ulimit values for the process and also set the [`schedular.limit`](https://www.elastic.co/guide/en/beats/heartbeat/6.0/configuration-heartbeat-options.html#heartbeat-scheduler-limit) option appropriately.
For GA we would like to have an I/O rate limit config option which could help when monitoring lots of services. And we might also want to add some DNS caching as that can also get expensive when monitoring lots of services.
I recommend giving the latest release a try and seeing what issues you encounter, and we can make sure these are accounted for in the roadmap.
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [October 17, 2017, 1:17pm UTC](https://discuss.elastic.co/t/maximum-capacity-for-heartbeat/101021/3 "2017-10-17T13:17:22Z")
This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.