108388 - Caching of DNS entries has stopped working

Status: VERIFIED WORKSFORME

(Core :: Networking, defect)

Description

[Keyser Sose]

I dont know when this stopped working but within the last couple months i have
noticed no difference in speed after going to a site again a second time (as you
should see a slower lookup time on the first and almost none on the 2nd).

I always thought this was my imagination but the last couple days i have been
having DNS lookup problems on the server side with it sometimes responding and
sometimes not (and it happens in all my apps so i know its not just mozilla).

After the first time it resolves the 2nd time doesnt resolve (even though it
should be cache).

This slows down performance a lot.

Comment 1

[Bradley Baetz (:bbaetz)]

-> gordon

Comment 2

[gordon]

When I set breakpoints on the code responsible for initiating dns lookups, I only 
see one lookup per domain initiated for large sites such as www.cnn.com and 
www.usatoday.com.  Also, I can reload and shift-reload with no dns lookups 
initiated at all.

It seems to still be working.  Have you added a line to your prefs that might 
have disabled it?  The relevant prefs are:

"network.dnsCacheEntries"
"network.dnsCacheExpiration"

If they do not exist the defaults are network.dnsCacheEntries=32 and 
network.dnsCacheExpiration=300 (seconds).

Marking WORKSFORME.

Comment 3

[benc]

VERIFIED/WFM:
Mozilla 1.4b, allplats