[ovirt-users] Terribly slow web consile post migration of oVirt Engine from one host to another host

[Anantha Raghava]

Hi,

I was able to migrate the oVirt Engine from one host to another using 
engine-backup utility. On the new host, the data is loaded properly but 
the Administration Portal is terribly slow.

It take about 2 to 3 minutes to allow me to enter user name & password. 
Once logged in, it takes hell a lot of time to show up the data. Click 
on a tab, we need to wait for a good amount of time to see the actual 
data. Even the refresh is taking time to execute although it is set to 5 
Seconds.

But if I enable old server and connect, every thing works quickly.

Note:

1. We do not have DNS in our environment.
2. Engine name & even the IP is retained the same.
3. Before migration, we stopped ovirt-engine on old server, took the 
backup, shutdown & disconnected the old server.
4. We installed the ovirt-engine on new server, run engine setup, noted 
down the DB password, did engine-cleanup, restored the data using 
engine-backup utility and executed engine-setup again. It did recognize 
restored data and only httpd configuration was sought and we selected 
the defaults.

Result is terribly slow Web Console.

First, we attempted to setup ovirt-reports and later removed it thinking 
that may be slowing down the engine server. Yet the same result.

Commands used to backup from old server: "engine-backup --mode=backup 
--file=<filename> --log=<log file name> --provision-db"
Command used to restore on new server: "engine-backup --mode=restore 
--file=<backup-file-name> --log=<log-file-name> --change-db-credentials 
--db-host=localhost --db-user=engine --db-name=engine 
--db-password=<password noted down in step 4> --no-restore-permissions"

The command executed without any errors, resulting in a terribly slow 
web console.

Note: Without --restore-permissions, the restore fails. Did not 
understand what to give as restore permissions. Hence used 
--no-restore-permissions.

*Hardware configuration:*
*
**Old Server:* i3 Processor, 4 GB Memory, 1 Gbps NIC
*New Server :* Lenovo x3250 M5 Server with Intel Xeon Processor, 16 GB 
RAM, 2 X 1 Gbps NIC.

Just unable to understand why it is terribly slow.

-- 

Thanks & Regards,

Anantha Raghava


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