I am installing SharePoint 2013SP1 on a Windows2012R2 server. The SQL 2014 server is also a Windows 2012R2 server.
Both servers are virtual, and lives in the same hardware, but has different subnets.
The network speed is 10GB with less than 1ms delay between the two servers.
When I run SharePoint Products Configuration Wizard it takes 7 hours to complete!
As a test I moved the SQL Server to the same subnet as the SharePoint 2013 server and created a new farm.
This time the SharePoint Products Configuration Wizard took only 13 minutes to complete!
Then I tried yet again to create the farm to a different SQL server that is on a third subnet it again took 7 hours to complete?
Why is this? Am I missing something?
EDIT
I installed SQL on the SharePoint server and install was fast.
Now when I tried to install again to a SQL on same subnet the wizard is stuck on step 3 for several hours.
So the reason for this slow performance must be something else.
Problem is that after install the web site gets slow, even it there is just 2 test users.
Every link takes an extra 10 seconds before it opens versus instantly opening links on standalone version.
EDIT Below information on installation process.
Domain accounts used:
MyAdminAccount is local admin on both servers
SPAdminAccount is local admin on SP the server and OWNER on the SP SQL Instance
SPFarm has no special access beforer configuration wizard.
1) Using MyAdminAccount I install the database engine / SP instance on SQL server.
MyAdminAccount and SPAdminAccount is added as admins on instance.
2) I set max degree of parallelism = 1
I grant SPAdminAccount dbcreator and securityadmin ( also is sysadmin from step 1)
3) Login to SharePoint VM using SPAdminAccount
4) Run prerequisiteinstaller ( it needs a boot and continues )
5) I start the SharePoint Products Configuration Wizard ( as SPAdminAccount )
SPFarm account defined as farm account.
Wait 4-7 hours...
The wizard is stuck on step 3 creating config database.
I can see with SQL Server Profiler that stuff is happening.
No errors or warnings can be seen in any logs.