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тАО12-30-2019 03:45 AM
тАО12-30-2019 03:45 AM
3Par latency every Sunday @ 23h30
Hi,
we have since few weeks a latency issue every Sundy between 23h30 and 00h00
can find what happen, nothing found on host side so far, i'm missing something but what ??
Thank you for your help
i have this every Sunday only !!
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тАО12-30-2019 03:51 AM
тАО12-30-2019 03:51 AM
Re: 3Par latency every Sunday @ 23h30
No backups or any highly consuming workload at that time? I would check the performance of exported vvols, if you see any 'abnormal' activity there, the chances are great it's on host side.
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- Tags:
- 3par latency
- cpu load
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тАО12-30-2019 09:01 AM
тАО12-30-2019 09:01 AM
Re: 3Par latency every Sunday @ 23h30
The shape of that graph suggests many systems (VMs?) being rebooted all at the same time.
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тАО12-31-2019 02:03 AM
тАО12-31-2019 02:03 AM
Re: 3Par latency every Sunday @ 23h30
Hi
i checked with the backup team, there is no backup running at that time, they told that they do only read on the array and no writes.
our 3PAR arrays are dedicated at 90% to VMware. i will ask the hyperviser team for reboot time.
but how can i see high writes iops on our reporting tool and at the same time a down pic on the ssmc, see image bellow :
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тАО12-31-2019 06:15 AM
тАО12-31-2019 06:15 AM
Re: 3Par latency every Sunday @ 23h30
i have noticed this, delack only on FC drives between 23h30 and 00h30, what that mean...
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тАО12-31-2019 06:32 AM - edited тАО12-31-2019 06:41 AM
тАО12-31-2019 06:32 AM - edited тАО12-31-2019 06:41 AM
Re: 3Par latency every Sunday @ 23h30
Delayed Acks.. You should probably be able to see them if you run a Controller Node Cache - Performance Statictics report from SSMC. Isn't there any running task which might lead to high CPU & delayed ack?
cli> showtask -active
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тАО12-31-2019 07:41 AM
тАО12-31-2019 07:41 AM
Re: 3Par latency every Sunday @ 23h30
Hi,
showtask -active is for live report, we have only AO scheluded @ 02h00 AM
there is no active task Sunday from 23h00 to 00h00 expect some harmless small defragementation process
I see some Delack on SSMC, on only 1 node i have no problem, problem occur when get delack on all nodes