# Heartbeat schedule not work when has large number of hosts
**URL:** https://discuss.elastic.co/t/heartbeat-schedule-not-work-when-has-large-number-of-hosts/253522
**Category:** Beats
**Tags:** heartbeat
**Created:** [October 28, 2020, 6:19am UTC](https://discuss.elastic.co/t/heartbeat-schedule-not-work-when-has-large-number-of-hosts/253522 "2020-10-28T06:19:39Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@luckyclue](https://discuss.elastic.co/u/luckyclue)
#### Post date: [October 28, 2020, 6:19am UTC](https://discuss.elastic.co/t/heartbeat-schedule-not-work-when-has-large-number-of-hosts/253522/1 "2020-10-28T06:19:39Z")
heartbeat icmp monitor not work with large number of hosts with config schedule: '1 \* \* \* \* \* \*'
It did not show any error but cannot create index at elasticsearch .
not work (under 4096 hosts it is normal)
schedule: '1 \* \* \* \* \* \*'
work (more than 30000 hosts)
schedule: '@every 60s'
ps operating systems centos 8 already set file descriptor limit to 65535 . all hosts at same yml
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### Author:  [@Andrew\_Cholakian1](https://discuss.elastic.co/u/Andrew_Cholakian1)
#### Post date: [November 12, 2020, 2:27am UTC](https://discuss.elastic.co/t/heartbeat-schedule-not-work-when-has-large-number-of-hosts/253522/2 "2020-11-12T02:27:39Z")
Hmmm, this seems related to [https://github.com/elastic/beats/pull/22369](https://github.com/elastic/beats/pull/22369) . I haven't been able to replicate it myself, but I only tried with a few hundred pings. I'll try later this week with 10k or so.
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [December 10, 2020, 4:27am UTC](https://discuss.elastic.co/t/heartbeat-schedule-not-work-when-has-large-number-of-hosts/253522/3 "2020-12-10T04:27:40Z")
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