I've straced $ pgbench -c 5 -s 6 -t 1000
total 157k syscalls, 70k of them are rt_sigaction(SIGPIPE):
1754 poll([{fd=3, events=POLLOUT|POLLERR, revents=POLLOUT}], 1, -1) = 1
1754 rt_sigaction(SIGPIPE, {SIG_IGN}, {SIG_DFL}, 8) = 0
1754 send(3, "\0\0\0%\0\3\0\0user\0postgres\0database\0t"..., 37, 0) = 37
1754 rt_sigaction(SIGPIPE, {SIG_DFL}, {SIG_IGN}, 8) = 0
1754 poll([{fd=3, events=POLLIN|POLLERR, revents=POLLIN}], 1, -1) = 1
1754 recv(3, "R\0\0\0\10\0\0\0\0S\0\0\0\36client_encoding\0SQ"..., 16384, 0) = 169
1754 rt_sigaction(SIGPIPE, {SIG_IGN}, {SIG_DFL}, 8) = 0
1754 send(3, "Q\0\0\0\35SET search_path = public\0", 30, 0) = 30
1754 rt_sigaction(SIGPIPE, {SIG_DFL}, {SIG_IGN}, 8) = 0
1754 poll([{fd=3, events=POLLIN|POLLERR, revents=POLLIN}], 1, -1) = 1
1754 recv(3, "C\0\0\0\10SET\0Z\0\0\0\5I", 16384, 0) = 15
1754 rt_sigaction(SIGPIPE, {SIG_IGN}, {SIG_DFL}, 8) = 0
and so on. Is that really necessary?
Mark: could you strace your dbt2 app? I guess your app creates a similar streams of rt_sigaction calls.
-- Manfred
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