diff options
Diffstat (limited to 'doc/src/sgml/monitoring.sgml')
| -rw-r--r-- | doc/src/sgml/monitoring.sgml | 51 |
1 files changed, 32 insertions, 19 deletions
diff --git a/doc/src/sgml/monitoring.sgml b/doc/src/sgml/monitoring.sgml index d0d176cc54f..e5888fae2b5 100644 --- a/doc/src/sgml/monitoring.sgml +++ b/doc/src/sgml/monitoring.sgml @@ -2692,8 +2692,18 @@ description | Waiting for a newly initialized WAL file to reach durable storage <structfield>reads</structfield> <type>bigint</type> </para> <para> - Number of read operations, each of the size specified in - <varname>op_bytes</varname>. + Number of read operations. + </para> + </entry> + </row> + + <row> + <entry role="catalog_table_entry"> + <para role="column_definition"> + <structfield>read_bytes</structfield> <type>numeric</type> + </para> + <para> + The total size of read operations in bytes. </para> </entry> </row> @@ -2716,8 +2726,18 @@ description | Waiting for a newly initialized WAL file to reach durable storage <structfield>writes</structfield> <type>bigint</type> </para> <para> - Number of write operations, each of the size specified in - <varname>op_bytes</varname>. + Number of write operations. + </para> + </entry> + </row> + + <row> + <entry role="catalog_table_entry"> + <para role="column_definition"> + <structfield>write_bytes</structfield> <type>numeric</type> + </para> + <para> + The total size of write operations in bytes. </para> </entry> </row> @@ -2740,8 +2760,8 @@ description | Waiting for a newly initialized WAL file to reach durable storage <structfield>writebacks</structfield> <type>bigint</type> </para> <para> - Number of units of size <varname>op_bytes</varname> which the process - requested the kernel write out to permanent storage. + Number of units of size <symbol>BLCKSZ</symbol> (typically 8kB) which + the process requested the kernel write out to permanent storage. </para> </entry> </row> @@ -2766,8 +2786,7 @@ description | Waiting for a newly initialized WAL file to reach durable storage <structfield>extends</structfield> <type>bigint</type> </para> <para> - Number of relation extend operations, each of the size specified in - <varname>op_bytes</varname>. + Number of relation extend operations. </para> </entry> </row> @@ -2775,11 +2794,10 @@ description | Waiting for a newly initialized WAL file to reach durable storage <row> <entry role="catalog_table_entry"> <para role="column_definition"> - <structfield>extend_time</structfield> <type>double precision</type> + <structfield>extend_bytes</structfield> <type>numeric</type> </para> <para> - Time spent in extend operations in milliseconds (if - <xref linkend="guc-track-io-timing"/> is enabled, otherwise zero) + The total size of relation extend operations in bytes. </para> </entry> </row> @@ -2787,16 +2805,11 @@ description | Waiting for a newly initialized WAL file to reach durable storage <row> <entry role="catalog_table_entry"> <para role="column_definition"> - <structfield>op_bytes</structfield> <type>bigint</type> - </para> - <para> - The number of bytes per unit of I/O read, written, or extended. + <structfield>extend_time</structfield> <type>double precision</type> </para> <para> - Relation data reads, writes, and extends are done in - <varname>block_size</varname> units, derived from the build-time - parameter <symbol>BLCKSZ</symbol>, which is <literal>8192</literal> by - default. + Time spent in extend operations in milliseconds (if + <xref linkend="guc-track-io-timing"/> is enabled, otherwise zero) </para> </entry> </row> |