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Code & docs review for server instrumentation patch. File timestamps

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should surely be timestamptz not timestamp; fix some but not all of the
holes in check_and_make_absolute(); other minor cleanup.  Also put in
the missed catversion bump.
This commit is contained in:
Tom Lane
2005-08-12 18:23:56 +00:00
parent cb29f669b0
commit a43ea120bf
8 changed files with 210 additions and 165 deletions
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83
doc/src/sgml/func.sgml
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@ -1,5 +1,5 @@
<!--
$PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.278 2005/08/12 15:57:48 momjian Exp $
$PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.279 2005/08/12 18:23:53 tgl Exp $
PostgreSQL documentation
-->
@ -9072,13 +9072,13 @@ SELECT set_config('log_statement_stats', 'off', false);
<para>
The functions shown in <xref
linkend="functions-admin-signal-table"> sends control signals to
other server processes. Use of this function is restricted
linkend="functions-admin-signal-table"> send control signals to
other server processes. Use of these functions is restricted
to superusers.
</para>
<table id="functions-admin-signal-table">
<title>Backend Signalling Functions</title>
<title>Server Signalling Functions</title>
<tgroup cols="3">
<thead>
<row><entry>Name</entry> <entry>Return Type</entry> <entry>Description</entry>
@ -9088,7 +9088,7 @@ SELECT set_config('log_statement_stats', 'off', false);
<tbody>
<row>
<entry>
<literal><function>pg_cancel_backend</function>(<parameter>pid</parameter>)</literal>
<literal><function>pg_cancel_backend</function>(<parameter>pid</parameter> <type>int</>)</literal>
</entry>
<entry><type>int</type></entry>
<entry>Cancel a backend's current query</entry>
@ -9098,7 +9098,7 @@ SELECT set_config('log_statement_stats', 'off', false);
<literal><function>pg_reload_conf</function>()</literal>
</entry>
<entry><type>int</type></entry>
<entry>Causes server processes to reload their configuration files</entry>
<entry>Cause server processes to reload their configuration files</entry>
</row>
</tbody>
</tgroup>
@ -9113,8 +9113,8 @@ SELECT set_config('log_statement_stats', 'off', false);
</para>
<para>
<function>pg_reload_conf</> sends a SIGHUP signal to the
postmaster, causing the reload of the configuration files
in all backend processes.
postmaster, causing reload of the configuration files
in all server processes.
</para>
<indexterm zone="functions-admin">
@ -9144,7 +9144,7 @@ SELECT set_config('log_statement_stats', 'off', false);
<tbody>
<row>
<entry>
<literal><function>pg_start_backup</function>(<parameter>label_text</parameter>)</literal>
<literal><function>pg_start_backup</function>(<parameter>label</> <type>text</>)</literal>
</entry>
<entry><type>text</type></entry>
<entry>Set up for performing on-line backup</entry>
@ -9219,48 +9219,48 @@ SELECT set_config('log_statement_stats', 'off', false);
<tbody>
<row>
<entry><function>pg_column_size</function>(<parameter>any</parameter>)</entry>
<entry><function>pg_column_size</function>(<type>any</type>)</entry>
<entry><type>integer</type></entry>
<entry>Number of bytes used to store a particular value (possibly compressed)</entry>
</row>
<row>
<entry>
<literal><function>pg_tablespace_size</function>(<parameter>oid</parameter>)</literal>
<literal><function>pg_tablespace_size</function>(<type>oid</type>)</literal>
</entry>
<entry><type>bigint</type></entry>
<entry>Total disk space used by the tablespace with the specified OID</entry>
</row>
<row>
<entry>
<literal><function>pg_tablespace_size</function>(<parameter>name</parameter>)</literal>
<literal><function>pg_tablespace_size</function>(<type>name</type>)</literal>
</entry>
<entry><type>bigint</type></entry>
<entry>Total disk space used by the tablespace with the specified name</entry>
</row>
<row>
<entry>
<literal><function>pg_database_size</function>(<parameter>oid</parameter>)</literal>
<literal><function>pg_database_size</function>(<type>oid</type>)</literal>
</entry>
<entry><type>bigint</type></entry>
<entry>Total disk space used by the database with the specified OID</entry>
</row>
<row>
<entry>
<literal><function>pg_database_size</function>(<parameter>name</parameter>)</literal>
<literal><function>pg_database_size</function>(<type>name</type>)</literal>
</entry>
<entry><type>bigint</type></entry>
<entry>Total disk space used by the database with the specified name</entry>
</row>
<row>
<entry>
<literal><function>pg_relation_size</function>(<parameter>oid</parameter>)</literal>
<literal><function>pg_relation_size</function>(<type>oid</type>)</literal>
</entry>
<entry><type>bigint</type></entry>
<entry>Disk space used by the table or index with the specified OID</entry>
</row>
<row>
<entry>
<literal><function>pg_relation_size</function>(<parameter>text</parameter>)</literal>
<literal><function>pg_relation_size</function>(<type>text</type>)</literal>
</entry>
<entry><type>bigint</type></entry>
<entry>Disk space used by the table or index with the specified name.
@ -9268,7 +9268,7 @@ SELECT set_config('log_statement_stats', 'off', false);
</row>
<row>
<entry>
<literal><function>pg_complete_relation_size</function>(<parameter>oid</parameter>)</literal>
<literal><function>pg_complete_relation_size</function>(<type>oid</type>)</literal>
</entry>
<entry><type>bigint</type></entry>
<entry>Total disk space used by the table with the specified OID,
@ -9276,7 +9276,7 @@ SELECT set_config('log_statement_stats', 'off', false);
</row>
<row>
<entry>
<literal><function>pg_complete_relation_size</function>(<parameter>text</parameter>)</literal>
<literal><function>pg_complete_relation_size</function>(<type>text</type>)</literal>
</entry>
<entry><type>bigint</type></entry>
<entry>Total disk space used by the table with the specified name,
@ -9285,7 +9285,7 @@ SELECT set_config('log_statement_stats', 'off', false);
</row>
<row>
<entry>
<literal><function>pg_size_pretty</function>(<parameter>bigint</parameter>)</literal>
<literal><function>pg_size_pretty</function>(<type>bigint</type>)</literal>
</entry>
<entry><type>text</type></entry>
<entry>Converts a size in bytes into a human-readable format with size units</entry>
@ -9325,11 +9325,11 @@ SELECT set_config('log_statement_stats', 'off', false);
<para>
The functions shown in <xref
linkend="functions-admin-genfile"> provide native file access to
files on the machine hosting the server. Only files relative to
the cluster directory are allowed, and the <varname>log_directory</>,
because the log file directory might be stored outside the
cluster directory. Use of these functions is restricted to
superusers.
files on the machine hosting the server. Only files within the
database cluster directory and the <varname>log_directory</> may be
accessed. Use a relative path for files within the cluster directory,
and a path matching the <varname>log_directory</> configuration setting
for log files. Use of these functions is restricted to superusers.
</para>
<table id="functions-admin-genfile">
@ -9343,17 +9343,17 @@ SELECT set_config('log_statement_stats', 'off', false);
<tbody>
<row>
<entry>
<literal><function>pg_file_length</function>(<parameter>filename_text</parameter>)</literal>
<literal><function>pg_file_length</function>(<parameter>filename</> <type>text</>)</literal>
<indexterm zone="functions-admin">
<primary>pg_file_length</primary>
</indexterm>
</entry>
<entry><type>int8</type></entry>
<entry>Returns the file length</entry>
<entry>Return the file length</entry>
</row>
<row>
<entry>
<literal><function>pg_ls_dir</function>(<parameter>dirname_text</parameter>,<parameter>fullpath_bool</parameter>)</literal>
<literal><function>pg_ls_dir</function>(<parameter>dirname</> <type>text</>)</literal>
<indexterm zone="functions-admin">
<primary>pg_ls_dir</primary>
</indexterm>
@ -9363,18 +9363,17 @@ SELECT set_config('log_statement_stats', 'off', false);
</row>
<row>
<entry>
<literal><function>pg_read_file</function>(<parameter>filename_text</parameter>,
<parameter>offset_int8</parameter>,<parameter>length_int8</parameter>)</literal>
<literal><function>pg_read_file</function>(<parameter>filename</> <type>text</>, <parameter>offset</> <type>int8</>, <parameter>length</> <type>int8</>)</literal>
</entry>
<entry><type>text</type></entry>
<entry>Returns the contents of a text file</entry>
<entry>Return the contents of a text file</entry>
</row>
<row>
<entry>
<literal><function>pg_stat_file</function>(<parameter>filename_text</parameter>)</literal>
<literal><function>pg_stat_file</function>(<parameter>filename</> <type>text</>)</literal>
</entry>
<entry><type>record</type></entry>
<entry>Returns information about the file</entry>
<entry>Return information about the file</entry>
</row>
</tbody>
</tgroup>
@ -9385,8 +9384,9 @@ SELECT set_config('log_statement_stats', 'off', false);
</indexterm>
<para>
<function>pg_read_file()</> returns part of a textfile, starting
at the given offset, returning length bytes. If offset is negative,
it is treated relative to the end of the file.
at the given offset, returning at most length bytes (less if the
end of file is reached first). If offset is negative,
it is relative to the end of the file.
</para>
<indexterm zone="functions-admin">
@ -9396,18 +9396,25 @@ SELECT set_config('log_statement_stats', 'off', false);
<function>pg_stat_file()</> returns a record containing the
length, last accessed timestamp, last modified timestamp,
creation timestamp, and a flag indicating if it is a directory.
Use it like this:
<programlisting>
SELECT *
FROM pg_stat_file('filename')
AS s(length int8, atime timestamptz, mtime timestamptz,
ctime timestamptz, isdir bool);
</programlisting>
</para>
<para>
The function shown in <xref
linkend="functions-admin-logfile"> forces the server
logfile to be rotated if <varname>redirect_stderr</>
is used for logging. Use of this functions is restricted
logfile to be rotated. This works only when <varname>redirect_stderr</>
is used for logging. Use of this function is restricted
to superusers.
</para>
<table id="functions-admin-logfile">
<title>Backend Logfile Functions</title>
<title>Server Logfile Functions</title>
<tgroup cols="3">
<thead>
<row><entry>Name</entry> <entry>Return Type</entry> <entry>Description</entry>
@ -9423,7 +9430,7 @@ SELECT set_config('log_statement_stats', 'off', false);
</indexterm>
</entry>
<entry><type>int</type></entry>
<entry>Rotate logfile</entry>
<entry>Rotate server's logfile</entry>
</row>
</tbody>
</tgroup>