On 17/04/15 09:20, Qiming Teng wrote:
Wondering if there is something misconfigured in my devstack
environment, which was reinstalled on RHEL7 about 10 days ago.
I'm often running into mysql connections problem as shown below:
$ mysql
ERROR 1040 (HY000): Too many connections
When I try dump the mysql connection list, I'm getting the followng
result after a 'systemctl restart mariadb.service':
$ mysqladmin processlist | grep nova | wc -l
125
Most of the connections are at Sleep status:
$ mysqladmin processlist | grep nova | grep Sleep | wc -l
123
As for the workload, I'm currently only running two VMs in a multi-host
devstack environment.
So, my questions:
- Why do we have so many mysql connections from nova?
- Is it possible this is caused some misconfigurations?
- 125 connections in such a toy setup is insane, any hints on nailing
down the connections to the responsible nova components?
Can you show us the full listing for
mysqladmin processlist
as 125 seems high for a toy setup? How many nova instances are running?
I have a (single node) devstack setup with 2 nova instances running and
I have 9 mysql connections to the nova db.
Regards
Mark
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