No, syslog-ng disables that pseudo flow control when the destination is suspended.

On Oct 31, 2013 4:14 PM, "Evan Rempel" <erempel@uvic.ca> wrote:
With the threaded(yes) option I understand that there is a pseudo throttle cechanism
in effect. Can that result in this behaviour as well?

On 10/31/2013 07:52 AM, bugzilla@wwwold.balabit.com wrote:
> https://bugzilla.balabit.com/show_bug.cgi?id=258
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> --- Comment #1 from Balazs Scheidler <bazsi@balabit.hu>  2013-10-31 15:52:19 ---
> Is flow control enabled?
>
> If syslog-ng throttles /dev/log because of flow control exactly this stuff happens.
>
>


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