On Wed, Sep 12, 2007 at 03:22:32PM +0200, Christian Kuehn wrote: > Alex Kiernan wrote: > > I ran into this problem on a live box, so I ended up backing out and > > going back to bind, but I've grabbed a set of queries which reproduce > > the problem (eventually). > > > > When it stops doing stuff it, it looks like its not getting new queries: > > > > port_getn(7, 0x0012D108, 1024, 1, 0xFFBEF44C) = 0 [62] > > port_getn(7, 0x0012D108, 1024, 1, 0xFFBEF44C) = 0 [62] > > port_getn(7, 0x0012D108, 1024, 1, 0xFFBEF44C) = 0 [62] > > port_getn(7, 0x0012D108, 1024, 1, 0xFFBEF44C) = 0 [62] > > port_getn(7, 0x0012D108, 1024, 1, 0xFFBEF44C) = 0 [62] > > port_getn(7, 0x0012D108, 1024, 1, 0xFFBEF44C) = 0 [62] > > port_getn(7, 0x0012D108, 1024, 1, 0xFFBEF44C) = 0 [62] > > > > But it seems like it only happens after ~250K queries. I'm pushing my > > queries at it using UDP (using perl ParaDNS), once it has given up, > > its only the UDP queries which break - TCP still works. > > > > Any pointers where to start looking? > > > HI, > > we found the same problem and it looks like a problem with Sol10. > > Our fix was a small change in sysdeps/SunOS.inc > > ifeq ($(CC),cc) > CC:=gcc > endif > > LDFLAGS+=-lresolv -lsocket -lnsl > OS_SPECIFIC_INSTALL=mkdir -p $(DESTDIR)/etc/init.d ; cp pdns-recursor.init.d > $(D > ESTDIR)/etc/init.d/pdns-recursor > > #OPTIONALS:=optional/portsmplexer.o > > #optional/portsmplexer.o: portsmplexer.cc > # $(CXX) $(CXXFLAGS) -c $< -o $@ ; true > > > Good luck! > > Cheers > Christian > > -- > Christian K?hn > (Technical Consultant / Hostmaster) *snip* Surely you have a much higher overhead to handle the same number of queries now? Sun still has no Intel/AMD equivalent cpu's when comparing raw computing power in their SPARC gamma so every bit of juice you can squeeze out of it helps.
Hint: When using the sun4u platform, except for US-III 750 Mhz cpu's, you can use 4 MB pages for the recursor by using this command to start it: ppgsz -o heap=4M,anon=4M /usr/local/sbin/pdns_recursor (verify with: 'pmap -xs <pid>') This improves performance with something around 3% for a resolver with 800 MB, depending on your situation this may be less or even more. When using the portsmplexer it could make the problem appear less often. Jan Gyselinck _______________________________________________ Pdns-users mailing list [email protected] http://mailman.powerdns.com/mailman/listinfo/pdns-users
