Ask Your Question

Project->Compute->Overview shows wrong RAM usage

asked 2017-04-21 14:36:45 -0600

tiger gravatar image


I am not able to instantiate any images because OpenStack thinks I am out of memory. Under Project->Compute->Overview it shows 50GB used out of 50GB. The 50GB value is set in Admin->Defaults as 51200MB. I have one 'cirros' image running that has 4096MB allocated to it. Under Admin->Hypervisors it shows the physical host is using 28.1GB out of 96GB installed.

Using the 'free' command I confirm the 28 used out of 96 is valid. The 51200 limit is valid, but I have no clue why it believes it has reached that 51200MB limit.

Any help in what to look at / for, is appreciated!

edit retag flag offensive close merge delete

1 answer

Sort by ยป oldest newest most voted

answered 2017-04-21 16:43:40 -0600

tiger gravatar image

updated 2017-04-21 16:46:03 -0600

OK, I figured it out. Just go into the database and zero the damn thing out. Possibly significant is the fact that I had two failed instances that I deleted from the GUI. I have read that this confuses OpenStack? What's odd is that even if it were just the memory of two m1.mediums (4GB x 2), that doesn't account for why it was at 51200 (out of a max of 51200)

mysql -u root
MariaDB [(none)]> use nova; MariaDB [nova]> select id,resource,in_use from quota_usages;


| id | resource | in_use |

+----+-----------------+--------+ | 1 | instances | 2 | | 2 | ram | 51200 |

| 3 | cores | 3 | | 4 | instances | 10

| | 5 | ram | 40960 | | 6 | cores | 20

| | 7 | security_groups | 1 |

+----+-----------------+--------+ 7 rows in set (0.00 sec)

Sorry for the wacked-out formatting. Basically, id=2 is the offending one. Reset that column:

MariaDB [nova]> update quota_usages set in_use=-1 where id=2;

Wasn't any need to restart anything. Just close up MySQL and from the GUI look at Project->Compute->Overview and in my case, I now see 6GB out of 50GB, owing to the fact that I have an m1.small and an m1.medium running now.

Hope this helps someone.

edit flag offensive delete link more


Hello Can we change volume status information also similarly ?

Deepa gravatar imageDeepa ( 2018-01-25 05:32:51 -0600 )edit

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

Get to know Ask OpenStack

Resources for moderators

Question Tools

1 follower


Asked: 2017-04-21 14:36:45 -0600

Seen: 606 times

Last updated: Apr 21 '17