mirror of
https://github.com/postgres/postgres.git
synced 2025-05-02 11:44:50 +03:00
Update comments.
This commit is contained in:
parent
e3cec20ccd
commit
b21ee21455
@ -7,7 +7,7 @@
|
|||||||
*
|
*
|
||||||
*
|
*
|
||||||
* IDENTIFICATION
|
* IDENTIFICATION
|
||||||
* $Header: /cvsroot/pgsql/src/backend/commands/vacuum.c,v 1.131 1999/12/16 22:19:42 wieck Exp $
|
* $Header: /cvsroot/pgsql/src/backend/commands/vacuum.c,v 1.132 1999/12/29 10:12:23 momjian Exp $
|
||||||
*
|
*
|
||||||
*-------------------------------------------------------------------------
|
*-------------------------------------------------------------------------
|
||||||
*/
|
*/
|
||||||
@ -2145,8 +2145,8 @@ vc_tidreapped(ItemPointer itemptr, VPageList vpl)
|
|||||||
*
|
*
|
||||||
* We compute the column min, max, null and non-null counts.
|
* We compute the column min, max, null and non-null counts.
|
||||||
* Plus we attempt to find the count of the value that occurs most
|
* Plus we attempt to find the count of the value that occurs most
|
||||||
* frequently in each column
|
* frequently in each column. These figures are used to compute
|
||||||
* These figures are used to compute the selectivity of the column
|
* the selectivity of the column.
|
||||||
*
|
*
|
||||||
* We use a three-bucked cache to get the most frequent item
|
* We use a three-bucked cache to get the most frequent item
|
||||||
* The 'guess' buckets count hits. A cache miss causes guess1
|
* The 'guess' buckets count hits. A cache miss causes guess1
|
||||||
|
Loading…
x
Reference in New Issue
Block a user