grizzly: add sql_max_pool_size and sql_max_overflow options

[Tom Fifield]

As https://review.openstack.org/#/c/16595/ is merged, a nova config option has been changed

    A recent patch adds a sql_pool_size config option. This renames it to
    sql_max_pool_size and sets a default that equals SQLAlchemy's default
    (5).

No need to support sql_pool_size for backwards compatibility as it
was to be a new option in Grizzly, anyway.

 cfg.IntOpt('sql_max_pool_size',
 225 default=None, 225 default=5,
 226 help='If set, use this value for pool_size with sqlalchemy'), 226 help='Maximum number of SQL connections to keep open in a '
   227 'pool'),

[Tom Fifield (fifieldt)]

The other option mentioned should also be added (https://review.openstack.org/16279): sql_max_overflow

   224 cfg.IntOpt('sql_max_overflow',
   225 default=None,
   226 help='If set, use this value for max_overflow with '
   227 'sqlalchemy'),

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/19439

[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