Subject [Fwd: Re: [firebird-support] Max. number of connections]
Author Ann W. Harrison
Is there really a 1024 limit on connections built
into the server?

-------- Original Message --------
Subject: Re: [firebird-support] Max. number of connections
Date: Fri, 18 Sep 2009 11:25:10 +0300
From: Vlad Khorsun <hvlad@...>
To: <>
References: <>

>> max. number of connections latest releases of Firebird can handle ?

There is no built-in limit in the engine. Only practical one - amount
of memory.

> SuperServer has hardcoded limit in 1024 connections. Other
> architectures are limited by OS TCP/IP stack. To get more you must use
> clustering.

This is not true. I've established 5000 conections using XNET and
build of Firebird. INET have internal limit of 1024 sockets, yes, but
this is not engine's limit. WNET limited by 255 pipe instances. XNET
have no limit.

Note, 32-bit build of FB SS on windows will reach its limit of 2GB of
virtual address space near after 840 connections.




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