Dear All
This is in reference to the performance tuning , i had already gone through
the mailing list archives , but could not find answer to my
specific query mentioned here.
I had installed bind as a caching name server for test purposes and
planning to test performance that could give me around 1 qps.
The os running Centos 5.4 64 bit , with minimal packages installed. The
server is dual quad core Intel Xeon 2.53 GHz ,16 GB RAM with 300 GB Hdd(
Raid 1) .
*Bind version installed is bind 9.6.1-P3 . Source extracted and compiled
with the following options. *
./configure --enable-epoll --enable-atomic --enable-ipv6 --enable-chroot
--with-openssl --with-randomdev=/chroot/named
--disable-openssl-version-check --with-libtool --enable-threads
Chrooted bind installation is done.
Only named, ssh and ntp services are running on the servers.
Right now i am using queryperf to test the performance with sample query
file of thousand entries. Right now
i am getting only 2000 to 2300 qps . I am writing querylogs to a separate
partition with noatime enabled for the
partition.
OS hardening is done by removing unwanted services, closing all
unneccesary ports and securing the running services.
My system is now using only 3 GB of RAM of total 16 GB.
*Following is the output of uptime;free -m during performance testing*
[r...@localhost ~]# uptime;free -m
22:19:52 up 1 day, 6:06, 3 users, load average: 2.03, 2.06, 1.34
total used free sharedbuffers cached
Mem: 16047 3183 12864 0238 2037
-/+ buffers/cache:907 15140
Swap: 8189 0 8189
*Following is my named.conf*
acl testsetup_net {
10.201.31.0/26; };
acl blacklistnets {
192.0.2.0/24; 224.0.0.0/3; 10.0.0.0/8; 192.168.0.0/16;
};
// Main options defined here
options {
directory /conf;
dump-file named_dump.db;
statistics-file named.stats;
pid-file /var/run/named.pid;
allow-recursion { localhost; ; testsetup_net; };
allow-query { localhost; testsetup_net; };
allow-query-cache { localhost; testsetup_net; };
allow-transfer { none; };
blackhole { blacklistnets; };
recursive-clients 2;
version Not old!;
datasize default;
notify yes;
};
// Logging options are defined here.
logging { // logging option for named process
channel default_debug {
file /logs/named.log versions 10 size 50m;
print-time yes;
print-category yes;
severity dynamic;
};
channel queries { // logging option for queries to named
file /logs/query.log versions 20 size 100m;
print-time yes;
print-category yes;
severity dynamic;
};
category default { default_debug; };
category queries { queries; };// uncomment this to log queries
category config { default_debug; };
category security { default_debug; };
category network { default_debug; };
category lame-servers { null; };
category edns-disabled { null; };
};
zone . in {
type hint;
file db.rootcache;
};
zone localhost in {
type master;
file db.local;
notify no;
};
zone 0.0.127.in-addr.arpa in {
type master;
file db.127.0.0;
notify no;
};
Kindly guide me for improving the bind performance from 2000 qps to
nearly 1 qps. Which are the parameters i should change for improving
the performance? Any os level parameters to be changed for improving the
performance?
thanks in advance
Regards
Shiva Raman
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