Re: [HACKERS] tcp_keepalives_idle
On Thu, Nov 14, 2013 at 11:32:23AM +0100, Marko Tiikkaja wrote: On 11/14/13 7:08 AM, Tatsuo Ishii wrote: It means the connection is idle except for keepalive packets. We could perhaps just drop the word otherwise, if people find it confusing. Wah. I seemed to completely misunderstand what the pharase says. Thanks for clarification. I agree to drop otherwise. I had some problem interpreting these explanations as well: http://www.postgresql.org/message-id/527a21f1.2000...@joh.to Compare that to the description in the libpq documentation: Controls the number of seconds of inactivity after which TCP should send a keepalive message to the server.. Good point. I have improved the server-side keepalive parameter descriptions to use the superior libpq text, with adjustment. Applied patch attached. -- Bruce Momjian br...@momjian.ushttp://momjian.us EnterpriseDB http://enterprisedb.com + Everyone has their own god. + -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
Re: [HACKERS] tcp_keepalives_idle
On Fri, Mar 7, 2014 at 10:03:42PM -0500, Bruce Momjian wrote: On Thu, Nov 14, 2013 at 11:32:23AM +0100, Marko Tiikkaja wrote: On 11/14/13 7:08 AM, Tatsuo Ishii wrote: It means the connection is idle except for keepalive packets. We could perhaps just drop the word otherwise, if people find it confusing. Wah. I seemed to completely misunderstand what the pharase says. Thanks for clarification. I agree to drop otherwise. I had some problem interpreting these explanations as well: http://www.postgresql.org/message-id/527a21f1.2000...@joh.to Compare that to the description in the libpq documentation: Controls the number of seconds of inactivity after which TCP should send a keepalive message to the server.. Good point. I have improved the server-side keepalive parameter descriptions to use the superior libpq text, with adjustment. Applied patch attached. Oops, now attached. -- Bruce Momjian br...@momjian.ushttp://momjian.us EnterpriseDB http://enterprisedb.com + Everyone has their own god. + diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml new file mode 100644 index 86dbd0f..2811f11 *** a/doc/src/sgml/config.sgml --- b/doc/src/sgml/config.sgml *** include 'filename' *** 684,691 /indexterm listitem para ! Specifies the number of seconds before sending a keepalive packet on ! an otherwise idle connection. A value of 0 uses the system default. This parameter is supported only on systems that support the symbolTCP_KEEPIDLE/ or symbolTCP_KEEPALIVE/ symbols, and on Windows; on other systems, it must be zero. --- 684,692 /indexterm listitem para ! Specifies the number of seconds of inactivity after which TCP ! should send a keepalive message to the client. A value of 0 uses ! the system default. This parameter is supported only on systems that support the symbolTCP_KEEPIDLE/ or symbolTCP_KEEPALIVE/ symbols, and on Windows; on other systems, it must be zero. *** include 'filename' *** 708,715 /indexterm listitem para ! Specifies the number of seconds between sending keepalives on an ! otherwise idle connection. A value of 0 uses the system default. This parameter is supported only on systems that support the symbolTCP_KEEPINTVL/ symbol, and on Windows; on other systems, it must be zero. --- 709,717 /indexterm listitem para ! Specifies the number of seconds after which a TCP keepalive message ! that is not acknowledged by the client should be retransmitted. ! A value of 0 uses the system default. This parameter is supported only on systems that support the symbolTCP_KEEPINTVL/ symbol, and on Windows; on other systems, it must be zero. *** include 'filename' *** 732,739 /indexterm listitem para ! Specifies the number of keepalive packets to send on an otherwise idle ! connection. A value of 0 uses the system default. This parameter is supported only on systems that support the symbolTCP_KEEPCNT/ symbol; on other systems, it must be zero. In sessions connected via a Unix-domain socket, this parameter is --- 734,742 /indexterm listitem para ! Specifies the number of TCP keepalives that can be lost before ! the server's connection to the client is considered dead. A value of 0 ! uses the system default. This parameter is supported only on systems that support the symbolTCP_KEEPCNT/ symbol; on other systems, it must be zero. In sessions connected via a Unix-domain socket, this parameter is -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
Re: [HACKERS] tcp_keepalives_idle
On 11/14/13 7:08 AM, Tatsuo Ishii wrote: It means the connection is idle except for keepalive packets. We could perhaps just drop the word otherwise, if people find it confusing. Wah. I seemed to completely misunderstand what the pharase says. Thanks for clarification. I agree to drop otherwise. I had some problem interpreting these explanations as well: http://www.postgresql.org/message-id/527a21f1.2000...@joh.to Compare that to the description in the libpq documentation: Controls the number of seconds of inactivity after which TCP should send a keepalive message to the server.. Regards, Marko Tiikkaja -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
[HACKERS] tcp_keepalives_idle
Hi, I am struggling to understand what following phrase says: tcp_keepalives_idle (integer) Specifies the number of seconds before sending a keepalive packet on an otherwise idle connection. What I am not sure is the meaning of otherwise. Can I safely replace it to: Specifies the number of seconds before sending a keepalive packet on an other side of idle connection. What I try to want to mean here is, other side is frontend side connection point. Or I am completely misunderstanding? -- Tatsuo Ishii SRA OSS, Inc. Japan English: http://www.sraoss.co.jp/index_en.php Japanese: http://www.sraoss.co.jp -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
Re: [HACKERS] tcp_keepalives_idle
Tatsuo Ishii is...@postgresql.org writes: I am struggling to understand what following phrase says: tcp_keepalives_idle (integer) Specifies the number of seconds before sending a keepalive packet on an otherwise idle connection. It means the connection is idle except for keepalive packets. We could perhaps just drop the word otherwise, if people find it confusing. What I am not sure is the meaning of otherwise. Can I safely replace it to: Specifies the number of seconds before sending a keepalive packet on an other side of idle connection. No, that's not a good fix. regards, tom lane -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
Re: [HACKERS] tcp_keepalives_idle
Tatsuo Ishii is...@postgresql.org writes: I am struggling to understand what following phrase says: tcp_keepalives_idle (integer) Specifies the number of seconds before sending a keepalive packet on an otherwise idle connection. It means the connection is idle except for keepalive packets. We could perhaps just drop the word otherwise, if people find it confusing. Wah. I seemed to completely misunderstand what the pharase says. Thanks for clarification. I agree to drop otherwise. What I am not sure is the meaning of otherwise. Can I safely replace it to: Specifies the number of seconds before sending a keepalive packet on an other side of idle connection. No, that's not a good fix. Sure. I was absolutely misunderstood. -- Tatsuo Ishii SRA OSS, Inc. Japan English: http://www.sraoss.co.jp/index_en.php Japanese: http://www.sraoss.co.jp -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
