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The context of an I/O operation. Possible values are: normal: The default or standard context for a type of I/O operation. For example, by default, relation data is read into and written out from shared buffers. Thus, reads and writes of relation data to and from shared buffers are tracked in context normal. init: I/O operations performed while creating the WAL segments are tracked in context init. vacuum: I/O operations performed outside of shared buffers while vacuuming and analyzing permanent relations. Temporary table vacuums use the same local buffer pool as other temporary table I/O operations and are tracked in context normal. bulkread: Certain large read I/O operations done outside of shared buffers, for example, a sequential scan of a large table. bulkwrite: Certain large write I/O operations done outside of shared buffers, such as COPY.

此版本暂无所选语言的定义，以下显示原始英文内容。

View

pg_stat_io

Field

context

SQL type

text

Units named in the field definition

Not specified

Reset observation

Time at which these statistics were last reset.

documented

true

field

context

manual path

/docs/18/monitoring-stats.html

signature

SELECT context FROM pg_catalog.pg_stat_io;

source only

false

sql type

text

units mentioned

未知

view

pg_stat_io