diff options
Diffstat (limited to 'doc/src/sgml/ref/explain.sgml')
| -rw-r--r-- | doc/src/sgml/ref/explain.sgml | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/doc/src/sgml/ref/explain.sgml b/doc/src/sgml/ref/explain.sgml index 7ddb5a05c65..1c19e254dc2 100644 --- a/doc/src/sgml/ref/explain.sgml +++ b/doc/src/sgml/ref/explain.sgml @@ -171,8 +171,9 @@ ROLLBACK; <para> Include information on buffer usage. Specifically, include the number of shared blocks hit, read, dirtied, and written, the number of local blocks - hit, read, dirtied, and written, and the number of temp blocks read and - written. + hit, read, dirtied, and written, the number of temp blocks read and + written, and the time spent reading and writing data file blocks + (in milliseconds) if <xref linkend="guc-track-io-timing"/> is enabled. A <emphasis>hit</emphasis> means that a read was avoided because the block was found already in cache when needed. Shared blocks contain data from regular tables and indexes; |