[Pgpool-general] Why pgpool II always refuses connections?

Edmundo Robles L. erobles at sensacd.com.mx
Wed Dec 22 13:54:10 UTC 2010


http://nixcraft.com/centos-rhel-fedora/14526-redhat-limiting-maximum-number-processes-available-given-user.html

On 12/21/2010 07:57 PM, Zhidong She wrote:
> Hi, thanks for you reply.
> How to view the SCO and MAXUP value in my host? and how to change it?
>
> On Tue, Dec 21, 2010 at 10:27 PM, Edmundo Robles L. 
> <erobles at sensacd.com.mx <mailto:erobles at sensacd.com.mx>> wrote:
>
>     how many  process by user are setting in your system???
>
>     maybe this could help you, before i have a limit of 100 process on
>     SCO,
>     because the MAXUP  variable  have that value. So i can  have near
>     of  90
>     connection trough pgpool.
>
>     On 12/21/2010 03:53 AM, Zhidong She wrote:
>     > pgpool can accept new connection from psql,  and can finish pgbench
>     > test without "-C" option.
>     > I also can run "-C" again without restart pgpool, but it always
>     > refused new connection after 28232 tries.
>     >
>     > Just now I setup a new pgpool platform in our lab, we got same
>     failure
>     > with pgbench -C.
>     > Thanks very much for your care.
>     >
>     > On Tue, Dec 21, 2010 at 5:35 PM, Tatsuo Ishii
>     <ishii at sraoss.co.jp <mailto:ishii at sraoss.co.jp>
>     > <mailto:ishii at sraoss.co.jp <mailto:ishii at sraoss.co.jp>>> wrote:
>     >
>     >     After failure of pgbench -C, does pgpool still accept
>     connections
>     >     from psql?
>     >     Or does it become unusable until restarting?
>     >     --
>     >     Tatsuo Ishii
>     >     SRA OSS, Inc. Japan
>     >     English: http://www.sraoss.co.jp/index_en.php
>     >     Japanese: http://www.sraoss.co.jp
>     >
>     > > No any error on message or pgpool log.
>     > > Our platform is centos5.8
>     > > Kernel is: 2.6.18-164.el5 #1 SMP Thu Sep 3 03:28:30 EDT 2009
>     >     x86_64 x86_64
>     > > x86_64 GNU/Linux
>     > >
>     > > On Tue, Dec 21, 2010 at 5:27 PM, Tatsuo Ishii
>     > <ishii at sraoss.co.jp <mailto:ishii at sraoss.co.jp>
>     <mailto:ishii at sraoss.co.jp <mailto:ishii at sraoss.co.jp>>> wrote:
>     > >
>     > >> Is there any error message in pgpool log or /var/log/messages?
>     > >> What is the platform are you running on?
>     > >> --
>     > >> Tatsuo Ishii
>     > >> SRA OSS, Inc. Japan
>     > >> English: http://www.sraoss.co.jp/index_en.php
>     > >> Japanese: http://www.sraoss.co.jp
>     > >>
>     > >> > Hi all,
>     > >> >
>     > >> > We are testing pgpool II by pgbench, when we use below
>     >     command to do the
>     > >> > test, the pgpool runs ok.
>     > >> > /opt/PostgreSQL/8.4/bin/pgbench -t 2000 -c 20 -h 172.17.3.10
>     >     -p 9999 -U
>     > >> > postgres pgbench
>     > >> >
>     > >> > But if we add "-C" option, which means to establish new
>     >     connection for
>     > >> every
>     > >> > transaction, the pgpool II will always refuse the connections
>     >     after about
>     > >> > 28230 successful connection.
>     > >> > /opt/PostgreSQL/8.4/bin/pgbench -t 2000 -C -c 20 -h
>     >     172.17.3.10 -p 9999
>     > >> -U
>     > >> > postgres pgbench
>     > >> >
>     > >> > I tried many times, and the number of transactions actually
>     >     processed is
>     > >> > always at 28232 or so.
>     > >> >
>     > >> > Please see below the detail infomation, any pgpool arguments
>     >     need to be
>     > >> > adjusted to avoid this issue?
>     > >> >
>     > >> > Thanks very much for your help!!!
>     > >> >
>     > >> >
>     > >>
>     >    
>     =======================================================================================
>     > >> > [root at ucs09 shell]# /opt/PostgreSQL/8.4/bin/pgbench -C -t
>     >     2000 -c 20 -h
>     > >> > 172.17.3.10 -p 9999 -U postgres pgbench
>     > >> > starting vacuum...end.
>     > >> > Connection to database "pgbench" failed:
>     > >> > could not connect to server: Cannot assign requested address
>     > >> >         Is the server running on host "172.17.3.10" and
>     accepting
>     > >> >         TCP/IP connections on port 9999?
>     > >> > Client 12 aborted in establishing connection.
>     > >> > Connection to database "pgbench" failed:
>     > >> > could not connect to server: Cannot assign requested address
>     > >> >         Is the server running on host "172.17.3.10" and
>     accepting
>     > >> >         TCP/IP connections on port 9999?
>     > >> > Client 13 aborted in establishing connection.
>     > >> > Connection to database "pgbench" failed:
>     > >> > could not connect to server: Cannot assign requested address
>     > >> >         Is the server running on host "172.17.3.10" and
>     accepting
>     > >> >         TCP/IP connections on port 9999?
>     > >> > Client 3 aborted in establishing connection.
>     > >> > Connection to database "pgbench" failed:
>     > >> > could not connect to server: Cannot assign requested address
>     > >> >         Is the server running on host "172.17.3.10" and
>     accepting
>     > >> >         TCP/IP connections on port 9999?
>     > >> > Client 0 aborted in establishing connection.
>     > >> > Connection to database "pgbench" failed:
>     > >> > could not connect to server: Cannot assign requested address
>     > >> >         Is the server running on host "172.17.3.10" and
>     accepting
>     > >> >         TCP/IP connections on port 9999?
>     > >> > Client 16 aborted in establishing connection.
>     > >> > Connection to database "pgbench" failed:
>     > >> > could not connect to server: Cannot assign requested address
>     > >> >         Is the server running on host "172.17.3.10" and
>     accepting
>     > >> >         TCP/IP connections on port 9999?
>     > >> > Client 8 aborted in establishing connection.
>     > >> > Connection to database "pgbench" failed:
>     > >> > could not connect to server: Cannot assign requested address
>     > >> >         Is the server running on host "172.17.3.10" and
>     accepting
>     > >> >         TCP/IP connections on port 9999?
>     > >> > Client 4 aborted in establishing connection.
>     > >> > Connection to database "pgbench" failed:
>     > >> > could not connect to server: Cannot assign requested address
>     > >> >         Is the server running on host "172.17.3.10" and
>     accepting
>     > >> >         TCP/IP connections on port 9999?
>     > >> > Client 5 aborted in establishing connection.
>     > >> > Connection to database "pgbench" failed:
>     > >> > could not connect to server: Cannot assign requested address
>     > >> >         Is the server running on host "172.17.3.10" and
>     accepting
>     > >> >         TCP/IP connections on port 9999?
>     > >> > Client 1 aborted in establishing connection.
>     > >> > Connection to database "pgbench" failed:
>     > >> > could not connect to server: Cannot assign requested address
>     > >> >         Is the server running on host "172.17.3.10" and
>     accepting
>     > >> >         TCP/IP connections on port 9999?
>     > >> > Client 9 aborted in establishing connection.
>     > >> > Connection to database "pgbench" failed:
>     > >> > could not connect to server: Cannot assign requested address
>     > >> >         Is the server running on host "172.17.3.10" and
>     accepting
>     > >> >         TCP/IP connections on port 9999?
>     > >> > Client 10 aborted in establishing connection.
>     > >> > Connection to database "pgbench" failed:
>     > >> > could not connect to server: Cannot assign requested address
>     > >> >         Is the server running on host "172.17.3.10" and
>     accepting
>     > >> >         TCP/IP connections on port 9999?
>     > >> > Client 2 aborted in establishing connection.
>     > >> > Connection to database "pgbench" failed:
>     > >> > could not connect to server: Cannot assign requested address
>     > >> >         Is the server running on host "172.17.3.10" and
>     accepting
>     > >> >         TCP/IP connections on port 9999?
>     > >> > Client 6 aborted in establishing connection.
>     > >> > Connection to database "pgbench" failed:
>     > >> > could not connect to server: Cannot assign requested address
>     > >> >         Is the server running on host "172.17.3.10" and
>     accepting
>     > >> >         TCP/IP connections on port 9999?
>     > >> > Client 11 aborted in establishing connection.
>     > >> > Connection to database "pgbench" failed:
>     > >> > could not connect to server: Cannot assign requested address
>     > >> >         Is the server running on host "172.17.3.10" and
>     accepting
>     > >> >         TCP/IP connections on port 9999?
>     > >> > Client 15 aborted in establishing connection.
>     > >> > Connection to database "pgbench" failed:
>     > >> > could not connect to server: Cannot assign requested address
>     > >> >         Is the server running on host "172.17.3.10" and
>     accepting
>     > >> >         TCP/IP connections on port 9999?
>     > >> > Client 14 aborted in establishing connection.
>     > >> > Connection to database "pgbench" failed:
>     > >> > could not connect to server: Cannot assign requested address
>     > >> >         Is the server running on host "172.17.3.10" and
>     accepting
>     > >> >         TCP/IP connections on port 9999?
>     > >> > Client 7 aborted in establishing connection.
>     > >> > Connection to database "pgbench" failed:
>     > >> > could not connect to server: Cannot assign requested address
>     > >> >         Is the server running on host "172.17.3.10" and
>     accepting
>     > >> >         TCP/IP connections on port 9999?
>     > >> > Client 17 aborted in establishing connection.
>     > >> > Connection to database "pgbench" failed:
>     > >> > could not connect to server: Cannot assign requested address
>     > >> >         Is the server running on host "172.17.3.10" and
>     accepting
>     > >> >         TCP/IP connections on port 9999?
>     > >> > Client 18 aborted in establishing connection.
>     > >> > Connection to database "pgbench" failed:
>     > >> > could not connect to server: Cannot assign requested address
>     > >> >         Is the server running on host "172.17.3.10" and
>     accepting
>     > >> >         TCP/IP connections on port 9999?
>     > >> > Client 19 aborted in establishing connection.
>     > >> > transaction type: TPC-B (sort of)
>     > >> > scaling factor: 20
>     > >> > query mode: simple
>     > >> > number of clients: 20
>     > >> > number of transactions per client: 2000
>     > >> > number of transactions actually processed: 28232/40000
>     > >> > tps = 841.807364 (including connections establishing)
>     > >> > tps = 2069.595197 (excluding connections establishing)
>     > >>
>     >
>     >
>     >
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