getentが遅い件 => nameserverへのアクセスが遅い為

# strace -r -o strace.log getent group

0.000088 connect(4, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("172.16.250.3")}, 28) = 0 ※nameserverにアクセス
0.000138 fcntl(4, F_GETFL) = 0x2 (flags O_RDWR)
0.000078 fcntl(4, F_SETFL, O_RDWR|O_NONBLOCK) = 0
0.000080 gettimeofday({1176982087, 259651}, NULL) = 0
0.000086 poll([{fd=4, events=POLLOUT, revents=POLLOUT}], 1, 0) = 1
0.000093 sendto(4, "\315d\1\0\0\1\0\0\0\0\0\0\ngfile-test\0033si\2co\2j"..., 38, MSG_NOSIGNAL, NULL, 0) = 38
0.000114 poll([{fd=4, events=POLLIN}], 1, 5000) = 0
4.996302 socket(PF_INET, SOCK_DGRAM, IPPROTO_IP) = 5 ※ここでひっかかる
0.000082 connect(5, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("172.16.250.4")}, 28) = 0

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# less /etc/resolv.conf

-

(変更前)
nameserver 172.16.250.3
nameserver 172.16.250.4
(変更後)
#nameserver 172.16.250.3
#nameserver 172.16.250.4
上記のようにコメントアウトしたら、早くなった