how to improve DNS server performance

[hua_1]

i have a 3440 used as a DNS server, if there any system kernel parameter shoud be adusted to impove the performance of it. or any configuration ??

[Geoff Wild · Accepted solution]

What improves DNS performance?

A lot of Ram

The max-cache-size option can be used to limit the amount of memory used by the cache, at the expense of reducing cache hit rates and causing more DNS traffic. It is still good practice to have enough memory to load all zone and cache data into memory â unfortunately, the best way to determine this for a given installation is to watch the name server in operation. After a few weeks the server process should reach a relatively stable size where entries are expiring from the cache as fast as they are being inserted.


As far as kernel parameters - check your dbc_max_pct

You want the dbc max to be somewhere between 400 and 800 mb of available ram.

IE - if you have 8GB of ram, set it to like 8

Rgds...Geo

[hua_1]

thanks u , u must be familiar with DNS server configuration.
any more configuration which would improve the performance of DNS SERVER?

[harry d brown jr]

If you have a lot of OTHER ux boxes that use this server as a DNS server, then set up those ux boxes (hp-ux, linux, solaris, aix, ...) as DNS CACHING servers. A server that is setup to do DNS CACHING will query the main DNS server fewer times a day, thus improving the performance of the DNS server and improving the performance of the ux servers.


see: http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=722104

and especially: http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=840826

look for my attachment on that post. It can be used for creating DNS Caching servers.


BTW, what does:

what `which named`

return??

It should be BIND 9.2.0 revision 6: http://www.software.hp.com/portal/swdepot/displayProductInfo.do?productNumber=BIND9.2


live free or die
harry d brown jr