By default, flow reclamation is always running. Use the flow long-lived command to delay flow reclamation on lightly loaded CSSs so as to allow long-lived flows to continue even during a large period of inactivity. This command delays flow reclamation until one-fourth of the total Flow Control Blocks (FCBs) are in use.
Use the flow long-lived command only if the CSS reclaims flows too quickly and the number of flows on the CSS is relatively low. You may find this command particularly useful for a database application.
For example, to delay flow reclamation on a lightly loaded CSS, enter:
(config) flow long-lived
To disable the flow reclamation delay on the CSS, enter:
(config) no flow long-lived
For more information refer to the following url:
http://www.cisco.com/en/US/products/hw/contnetw/ps789/products_administration_guide_chapter09186a0080176bd1.html