# many holes in pmm grafana (pmm-admin check-network --no-emoji error sometimes)

**URL:** <https://forums.percona.com/t/many-holes-in-pmm-grafana-pmm-admin-check-network-no-emoji-error-sometimes/5851>\
**Category:** PMM 1.x\
**Created:** [September 7, 2017, 4:20am UTC](https://forums.percona.com/t/many-holes-in-pmm-grafana-pmm-admin-check-network-no-emoji-error-sometimes/5851 "2017-09-07T04:20:44Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![wangp](https://avatars.discourse-cdn.com/v4/letter/w/e8c25b/32.png) [@wangp](https://forums.percona.com/u/wangp)\
**Post date:** [September 7, 2017, 4:20am UTC](https://forums.percona.com/t/many-holes-in-pmm-grafana-pmm-admin-check-network-no-emoji-error-sometimes/5851/1 "2017-09-07T04:20:44Z")

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Hello,

I use pmm (version 1.0.6) for monitoing mysql/mariadb + linux os  
While I put more than 20 clients servers for monitoring, I get sometimes holes in pmm grafana and in the same time, pmm-admin check-network --no-emoji error as following in all the clients

- Client ← Server

* * *

SERVICE TYPE NAME REMOTE ENDPOINT STATUS

* * *

linux:metrics dl360s-62 10.198.234.139:42000 PROBLEM  
mysql:metrics MAD\_FUNDTP2\_PRD 10.198.234.139:42002 PROBLEM

This hole (error) can last 1 minute to thirty minutes and all is ok on app server + network + firewall + all clients  
And then all works, 1 hour (or dozen minutes) later, error (hole) again and so on.

I haven’t this problem when i put less clients servers for monitoring

Someone knows what’s matter with pmm ?

Thanks a lot  
Regards  
Pierre