grizzly: Add eventlet db_pool use for mysql

[Tom Fifield]

As https://review.openstack.org/16596 has been merged, there are new options in nova:

sql_dbpool_enable -- Enables the use of eventlet's db_pool
sql_min_pool_size -- Set the minimum number of SQL connections

The default for sql_dbpool_enable is False for now, so there is
no forced behavior changes for those using mysql. sql_min_pool_size
is defaulted to 1 to match behavior if not using db_pool.

   196 cfg.IntOpt('sql_min_pool_size',
   197 default=1,
   198 help='Minimum number of SQL connections to keep open in a '
   199 'pool'),

,
   221 cfg.IntOpt('sql_dbpool_enable',
   222 default=False,
   223 help="enable the use of eventlet's db_pool for MySQL"),

[Tom Fifield (fifieldt)]

https://review.openstack.org/19439

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/19439
Committed: http://github.com/openstack/openstack-manuals/commit/1a7433943dfb2935ce393e369a35dde2096d9575
Submitter: Jenkins
Branch: master

commit 1a7433943dfb2935ce393e369a35dde2096d9575
Author: Tom Fifield <email address hidden>
Date: Fri Jan 11 12:05:42 2013 +1100

    Add sql_max_pool_size option

    fixes bug 1087055

    grizzly adds a new option to nova: sql_max_pool_size, which is
    the max number of connections to keep open in a pool. This patch
    adds it to the config reference section.

    Patch 2 adds sql_max_overflow option and fixes a typo in the
    previous commit

    Patch 3
    fixes bug 1087054
    adds sql_min_pool_size and sql_dbpool_enable options

    Change-Id: Id9d122e3002c2a91aaf83560f4bbff06911517f3

[Tom Fifield (fifieldt)]

This patch: https://review.openstack.org/#/c/22163/

Renames configuration option sql_dbpool_enable to dbapi_use_tpool

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/24585

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/24585
Committed: http://github.com/openstack/openstack-manuals/commit/a6cd4bc89c55408b7cdbe4abf26184115b8af1c0
Submitter: Jenkins
Branch: master

commit a6cd4bc89c55408b7cdbe4abf26184115b8af1c0
Author: Tom Fifield <email address hidden>
Date: Sun Mar 17 10:11:54 2013 +0800

    Renames sql_dbpool_enable to dbapi_use_tpool

    This option was renamed in
    https://review.openstack.org/#/c/22163/
    this patch fixes up the changes.

    fixes bug 1087054

    Change-Id: Ia172eeef08bb8405aa9e0598e793c4d4d218501d