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Date:      Thu, 30 Nov 1995 11:05:14 -0500
From:      "Garrett A. Wollman" <wollman@lcs.mit.edu>
To:        ywliu <team_fbf@pristine.com.tw>
Cc:        questions@freebsd.org
Subject:   What is in_rtqtimo ?
Message-ID:  <9511301605.AA08576@halloran-eldar.lcs.mit.edu>
In-Reply-To: <199511301257.MAA18789@neptune.pristine.com.tw>
References:  <199511301257.MAA18789@neptune.pristine.com.tw>

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<<On Thu, 30 Nov 1995 12:57:11 +0000 (), ywliu <team_fbf@pristine.com.tw> said:

> Hi,
>   My 2.05R kernel keeps issuing messages :

> /kernel : in_rtqtimo: adjusted rtq_reallyold to xxxx

> where xxxx can be 1066, 710 or some other values.

> What is in_rtqtimo and what's all about ? Is this a serious problem ?

in_rtqtimo is the routine that periodically cleans the IP per-host
information cache (part of the routing table).  If, in the process of
cleaning, it notices that there are ``too many'' entries in the cache,
it cranks down the maximum lifetime of a cache entry and re-expires.
The parameters are all tunable, in the net.inet.ip branch of the MIB:

net.inet.ip.rtexpire = 3600		# current max lifetime
net.inet.ip.rtminexpire = 10		# minimum max lifetime
net.inet.ip.rtmaxcache = 128		# how many is ``too many''

-GAWollman

--
Garrett A. Wollman   | Shashish is simple, it's discreet, it's brief. ... 
wollman@lcs.mit.edu  | Shashish is the bonding of hearts in spite of distance.
Opinions not those of| It is a bond more powerful than absence.  We like people
MIT, LCS, ANA, or NSA| who like Shashish.  - Claude McKenzie + Florent Vollant



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