diff options
Diffstat (limited to 'doc/src/sgml/man1/pg_isready.1')
| -rw-r--r-- | doc/src/sgml/man1/pg_isready.1 | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/doc/src/sgml/man1/pg_isready.1 b/doc/src/sgml/man1/pg_isready.1 new file mode 100644 index 0000000..2f2c0bb --- /dev/null +++ b/doc/src/sgml/man1/pg_isready.1 @@ -0,0 +1,191 @@ +'\" t +.\" Title: pg_isready +.\" Author: The PostgreSQL Global Development Group +.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/> +.\" Date: 2021 +.\" Manual: PostgreSQL 13.4 Documentation +.\" Source: PostgreSQL 13.4 +.\" Language: English +.\" +.TH "PG_ISREADY" "1" "2021" "PostgreSQL 13.4" "PostgreSQL 13.4 Documentation" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +pg_isready \- check the connection status of a PostgreSQL server +.SH "SYNOPSIS" +.HP \w'\fBpg_isready\fR\ 'u +\fBpg_isready\fR [\fIconnection\-option\fR...] [\fIoption\fR...] +.SH "DESCRIPTION" +.PP +pg_isready +is a utility for checking the connection status of a +PostgreSQL +database server\&. The exit status specifies the result of the connection check\&. +.SH "OPTIONS" +.PP +\fB\-d \fR\fB\fIdbname\fR\fR +.br +\fB\-\-dbname=\fR\fB\fIdbname\fR\fR +.RS 4 +Specifies the name of the database to connect to\&. The +\fIdbname\fR +can be a +connection string\&. If so, connection string parameters will override any conflicting command line options\&. +.RE +.PP +\fB\-h \fR\fB\fIhostname\fR\fR +.br +\fB\-\-host=\fR\fB\fIhostname\fR\fR +.RS 4 +Specifies the host name of the machine on which the server is running\&. If the value begins with a slash, it is used as the directory for the Unix\-domain socket\&. +.RE +.PP +\fB\-p \fR\fB\fIport\fR\fR +.br +\fB\-\-port=\fR\fB\fIport\fR\fR +.RS 4 +Specifies the TCP port or the local Unix\-domain socket file extension on which the server is listening for connections\&. Defaults to the value of the +\fBPGPORT\fR +environment variable or, if not set, to the port specified at compile time, usually 5432\&. +.RE +.PP +\fB\-q\fR +.br +\fB\-\-quiet\fR +.RS 4 +Do not display status message\&. This is useful when scripting\&. +.RE +.PP +\fB\-t \fR\fB\fIseconds\fR\fR +.br +\fB\-\-timeout=\fR\fB\fIseconds\fR\fR +.RS 4 +The maximum number of seconds to wait when attempting connection before returning that the server is not responding\&. Setting to 0 disables\&. The default is 3 seconds\&. +.RE +.PP +\fB\-U \fR\fB\fIusername\fR\fR +.br +\fB\-\-username=\fR\fB\fIusername\fR\fR +.RS 4 +Connect to the database as the user +\fIusername\fR +instead of the default\&. +.RE +.PP +\fB\-V\fR +.br +\fB\-\-version\fR +.RS 4 +Print the +pg_isready +version and exit\&. +.RE +.PP +\fB\-?\fR +.br +\fB\-\-help\fR +.RS 4 +Show help about +pg_isready +command line arguments, and exit\&. +.RE +.SH "EXIT STATUS" +.PP +pg_isready +returns +0 +to the shell if the server is accepting connections normally, +1 +if the server is rejecting connections (for example during startup), +2 +if there was no response to the connection attempt, and +3 +if no attempt was made (for example due to invalid parameters)\&. +.SH "ENVIRONMENT" +.PP +\fBpg_isready\fR, like most other +PostgreSQL +utilities, also uses the environment variables supported by +libpq +(see +Section\ \&33.14)\&. +.PP +The environment variable +\fBPG_COLOR\fR +specifies whether to use color in diagnostic messages\&. Possible values are +always, +auto +and +never\&. +.SH "NOTES" +.PP +It is not necessary to supply correct user name, password, or database name values to obtain the server status; however, if incorrect values are provided, the server will log a failed connection attempt\&. +.SH "EXAMPLES" +.PP +Standard Usage: +.sp +.if n \{\ +.RS 4 +.\} +.nf +$ \fBpg_isready\fR +/tmp:5432 \- accepting connections +$ \fBecho $?\fR +0 +.fi +.if n \{\ +.RE +.\} +.PP +Running with connection parameters to a +PostgreSQL +cluster in startup: +.sp +.if n \{\ +.RS 4 +.\} +.nf +$ \fBpg_isready \-h localhost \-p 5433\fR +localhost:5433 \- rejecting connections +$ \fBecho $?\fR +1 +.fi +.if n \{\ +.RE +.\} +.PP +Running with connection parameters to a non\-responsive +PostgreSQL +cluster: +.sp +.if n \{\ +.RS 4 +.\} +.nf +$ \fBpg_isready \-h someremotehost\fR +someremotehost:5432 \- no response +$ \fBecho $?\fR +2 +.fi +.if n \{\ +.RE +.\} +.sp + |