backend_toolate - Backend conn. was closed

Poul-Henning Kamp phk at
Wed Sep 29 00:51:49 CEST 2010

In message <4CA26D2D.7060001 at>, Flavio Torres writes:

>Please, in varnishstat, what does backend_toolate means ?
>backend_toolate        826901         3.28 Backend conn. was closed

The backend closed an idle connection before we tried to reuse it.

Varnish picks or opens another connection.

If the  number is as high as you have here, it may pay off to
increase the idle-timeout on your backend.

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

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