# Weird spikes on multiple mysql graphs

**URL:** <https://forums.percona.com/t/weird-spikes-on-multiple-mysql-graphs/5898>\
**Category:** PMM 1.x\
**Created:** [September 29, 2017, 7:49am UTC](https://forums.percona.com/t/weird-spikes-on-multiple-mysql-graphs/5898 "2017-09-29T07:49:25Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Alex.by](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/alex.by/32/1073_2.png) [@Alex.by](https://forums.percona.com/u/Alex.by)\
**Post date:** [September 29, 2017, 7:49am UTC](https://forums.percona.com/t/weird-spikes-on-multiple-mysql-graphs/5898/1 "2017-09-29T07:49:25Z")

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Hi guys,

Pretty randomly we see spikes which simply don’t make any sense. For instance, IO traffic is 770 TBps or 262 Bil SELECTs. Check screenshots - it will explain everything.  
We monitor multiple instances and those spikes appear for one mysql only. It’s 5.6.25-73.1-log Percona Server. MySQL’s uptime is 2+ years. For example, Com\_select in SHOW GLOBAL STATUS is 1052298122417. Can it be due to large numbers?

Any ideas what’s wrong?

Alex

 ![photoid=49726](https://us1.discourse-cdn.com/flex019/uploads/percona1/original/2X/1/153c4dc3e4fb5296ebbb33b5ef97c00b2e50c3af.png)

 ![photoid=49727](https://us1.discourse-cdn.com/flex019/uploads/percona1/original/2X/6/6688234b0ecda02035bbff13a256c33e0cf442a7.png)

 ![photoid=49728](https://us1.discourse-cdn.com/flex019/uploads/percona1/original/2X/8/88f93f4e8ce9ef74b8205d54a50df252838bcb06.png)

 ![photoid=49729](https://us1.discourse-cdn.com/flex019/uploads/percona1/original/2X/5/5c48adbcf80c7764146c974a7672fd0f702fb0d6.png)