Comment 4 for bug 1564275

Reviewed: https://review.openstack.org/300658
Committed: https://git.openstack.org/cgit/openstack/kolla/commit/?id=65be6a2aee4aa019f59b2968f7378689ebdaa368
Submitter: Jenkins
Branch: stable/mitaka

commit 65be6a2aee4aa019f59b2968f7378689ebdaa368
Author: Steven Dake <email address hidden>
Date: Thu Mar 31 00:40:01 2016 -0700

    Increase database connections to 10000

    Scale limit testing on a 64 node cluster with 13 TB RAM and 2600
    cores showed that atleast 1800 database connections are required
    to appropriately start 2000 virtual machines simulateounsly. Other
    documentation on the internet recommends larger values such as 8000,
    so we set to a larger value that should be able to handle a maxed out
    512GB ram per compute node cluster with all services enabled.

    Change-Id: I8767cf3fb04e066cc22e796c647e944b4e4a1742
    Closes-Bug: #1564275
    (cherry picked from commit 1fac190cec3c628c8a4c745659fcec090d952abd)