selecttest tool
JINMEI Tatuya / 神明達哉
Jinmei_Tatuya at isc.org
Fri Aug 8 21:53:49 UTC 2008
At Fri, 08 Aug 2008 14:24:31 -0500,
Walter Gould <gouldwp at auburn.edu> wrote:
> > I guess we need more information to diagnose:
> >
> > - your detailed configuration (named.conf)
> >
> Jinmei,
>
> See our attached named.conf file.
I have a couple of suggestions:
1. you should specify a larger max-cache-size in named.conf. the
default size of 9.5.0 (32MB) is normally too conservative for a
busy server with many clients, reducing cache hit rate and making
the server busier, and possibly triggering subsequent performance
troubles as a result.
2. #1 may be sufficient for you, but you may also want to raise
recursive-clients (whose default is 1000) to some reasonable large
value (e.g., 10000). I suspect the primary reason for the SERVFAIL
in your case is that the server hits the recursive-clients quota.
I suspect the server left warning messages like ""no more recursive
clients: ...". Raising recursive-clients will at least solve this
issue.
---
JINMEI, Tatuya
Internet Systems Consortium, Inc.
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