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77d33559
编写于
5月 19, 1999
作者:
T
Tom Lane
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电子邮件补丁
差异文件
Minor improvements to postmaster/backend man pages.
上级
41543b06
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2
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50 addition
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26 deletion
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-26
src/man/postgres.1
src/man/postgres.1
+18
-8
src/man/postmaster.1
src/man/postmaster.1
+32
-18
未找到文件。
src/man/postgres.1
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77d33559
.\" This is -*-nroff-*-
.\" XXX standard disclaimer belongs here....
.\" $Header: /cvsroot/pgsql/src/man/Attic/postgres.1,v 1.1
4 1999/03/17 22:53:31 momjian
Exp $
.TH POSTGRESQL UNIX
12/08/96
PostgreSQL PostgreSQL
.\" $Header: /cvsroot/pgsql/src/man/Attic/postgres.1,v 1.1
5 1999/05/19 23:30:43 tgl
Exp $
.TH POSTGRESQL UNIX
05/19/99
PostgreSQL PostgreSQL
.SH NAME
postgres - the Postgres backend server
.SH SYNOPSIS
...
...
@@ -57,6 +57,11 @@ done while other Postgres backends are being managed by a
.IR postmaster
on this set of databases.
.PP
Some of the switches explained in this man page can be passed to the backend
through the "database options" field of a connection request, and thus can be
set for a particular backend without going to the trouble of restarting the
postmaster. This is particularly handy for debugging-related switches.
.PP
The optional argument
.IR dbname
specifies the name of the database to be accessed.
...
...
@@ -77,7 +82,8 @@ is the number of shared-memory buffers that the
.IR "postmaster"
has allocated for the backend server processes that it starts. If the
backend is running standalone, this specifies the number of buffers to
allocate. This value defaults to 64, and each buffer is 8k bytes.
allocate. This value defaults to 64 buffers, where each buffer is 8k bytes
(or whatever BLCKSZ is set to in config.h).
.TP
.BR "-C"
Do not show server version number.
...
...
@@ -116,9 +122,12 @@ useful for interactive use.
Specifies \*(lqquiet\*(rq mode.
.TP
.BR "-S"
Specifies the amount of memory to be used by internal sorts before using
disk files for sorting. This value is specified in 1k bytes, and
defaults to 512.
Specifies the amount of memory to be used by internal sorts and hashes
before resorting to temporary disk files. The value is specified in
kilobytes, and defaults to 512 kilobytes. Note that for a complex query,
several sorts and/or hashes might be running in parallel, and each one
will be allowed to use as much as -S kilobytes before it starts to put
data into temporary files.
.TP
.BR "-e"
The
...
...
@@ -185,8 +194,9 @@ Forbids the use of particular scan and join methods:
disable sequential and index scans respectively, while
.IR n ", " m " and " h
disable nested-loop, merge and hash joins respectively.
This is another feature that may not necessarily produce executable
plans.
(Neither sequential scans nor nested-loop joins can be disabled completely;
the -fs and -fn options simply discourage the optimizer from using those
plan types if it has any other alternative.)
.TP
.BR "-i"
Prevents query execution, but shows the plan tree.
...
...
src/man/postmaster.1
浏览文件 @
77d33559
.\" This is -*-nroff-*-
.\" XXX standard disclaimer belongs here....
.\" $Header: /cvsroot/pgsql/src/man/Attic/postmaster.1,v 1.1
5 1999/02/22 05:26:58 momjian
Exp $
.TH POSTMASTER UNIX 0
2/20
/99 PostgreSQL PostgreSQL
.\" $Header: /cvsroot/pgsql/src/man/Attic/postmaster.1,v 1.1
6 1999/05/19 23:30:43 tgl
Exp $
.TH POSTMASTER UNIX 0
5/19
/99 PostgreSQL PostgreSQL
.SH "NAME"
postmaster - run the Postgres postmaster
.SH "SYNOPSIS"
...
...
@@ -49,12 +49,17 @@ port]
The
.IR "postmaster"
manages the communication between frontend and backend processes, as
well as allocating the shared buffer pool and
semaphores (on machin
es
without a test-and-set instruction). The
well as allocating the shared buffer pool and
SysV semaphor
es
(on machines
without a test-and-set instruction). The
.IR postmaster
does not itself interact with the user and should be started as a
background process.
.BR "Only one postmaster should be run on a machine."
.PP
.BR "Only one postmaster should be running at a time in a given
Postgres installation."
Here, an installation means a database directory and postmaster port number.
You can run more than one postmaster on a machine only if each one has a
separate directory and port number.
.PP
The
.IR "postmaster"
...
...
@@ -65,12 +70,13 @@ understands the following command-line options:
is the number of shared-memory buffers for the
.IR "postmaster"
to allocate and manage for the backend server processes that it
starts. This value defaults to 64, and each buffer is 8k bytes.
starts. This value defaults to 64 buffers, where each buffer is 8k bytes
(or whatever BLCKSZ is set to in config.h).
.TP
.BR "-D" " data_dir"
Specifies the directory to use as the root of the tree of database
directories.
This directory uses the value of the environment
variable
directories.
If -D is not given, the default data directory name is
the value of the environment
variable
.SM PGDATA.
If
.SM PGDATA
...
...
@@ -86,7 +92,7 @@ is the maximum number of backend server processes that this postmaster
is allowed to start. In the stock configuration, this value defaults
to 64, and can be set as high as 1024 if your system will support that
many processes. Both the default and upper limit values can be altered
when building Postgres.
when building Postgres
(see src/include/config.h)
.
.TP
.BR "-S"
Specifies that the
...
...
@@ -113,7 +119,8 @@ authentication, use
to deny any unauthenticated
connections, use
.BR "-a nounauth .
This option no longer has any effect.
This option no longer has any effect! The pg_hba.conf configuration
file now controls authentication.
.TP
.BR "-b" " backend_pathname"
.IR "backend_pathname"
...
...
@@ -131,6 +138,9 @@ was invoked. If no pathname was specified, then the
.SM PATH
environment variable is searched for an executable named
\*(lqpostgres\*(rq).
This option is also obsolete, since the postmaster and backend are now
a single executable --- the postmaster forks a backend but does not do
an exec.
.TP
.BR "-d" " [debug_level]"
The optional argument
...
...
@@ -201,9 +211,12 @@ Specifies the TCP/IP port or local Unix domain socket file extension
on which the
.IR postmaster
is to listen for connections from frontend applications. Defaults to
5432, or the value of the
the value of the
.SM PGPORT
environment variable, or if
.SM PGPORT
environment variable (if set). If you specify a port other than the
is not set, then the default value established when Postgres was
compiled (normally 5432). If you specify a port other than the
default port then all frontend application users must specify the same
port (using command-line options or
.SM PGPORT\c
...
...
@@ -253,7 +266,7 @@ simplest and most common way to start the
.nf
# start with specific port and executable name
nohup postmaster -p -b /usr/postgres/bin/postgres &
nohup postmaster -p
1234
-b /usr/postgres/bin/postgres &
.fi
This command will start up a
...
...
@@ -281,7 +294,7 @@ postgres(1),
.BR "FindBackend: could not find a backend to execute..."
If you see this message, you do not have the
.IR "postgres"
executable in your path. Add the directoy in which postgres resides to
executable in your path. Add the directo
r
y in which postgres resides to
your path.
.TP
.BR "semget: No space left on device"
...
...
@@ -293,10 +306,11 @@ again. If this still doesn't work, you probably need to configure
your kernel for shared memory and semaphores as described in the
installation notes. If you run multiple
.IR postmaster s
on a single host, or have reduced the shared memory and semaphore
parameters from the defaults in the generic kernel, you may have to
go back and increase the shared memory and semaphores configured
into your kernel.
on a single host, or have a kernel with particularly small shared memory
and/or semaphore limits, you may have to reconfigure your kernel to increase
its shared memory or semaphore parameters. (You may be able to postpone
reconfiguring your kernel by reducing -B to reduce Postgres' shared memory
consumption, or by reducing -N to reduce Postgres' semaphore consumption.)
.TP
.BR "StreamServerPort: cannot bind to port"
If you see this message, you should be certain that there is no other
...
...
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