| Index: third_party/sqlite/tool/space_used.tcl
|
| ===================================================================
|
| --- third_party/sqlite/tool/space_used.tcl (revision 56608)
|
| +++ third_party/sqlite/tool/space_used.tcl (working copy)
|
| @@ -1,111 +0,0 @@
|
| -# Run this TCL script using "testfixture" in order get a report that shows
|
| -# how much disk space is used by a particular data to actually store data
|
| -# versus how much space is unused.
|
| -#
|
| -
|
| -# Get the name of the database to analyze
|
| -#
|
| -if {[llength $argv]!=1} {
|
| - puts stderr "Usage: $argv0 database-name"
|
| - exit 1
|
| -}
|
| -set file_to_analyze [lindex $argv 0]
|
| -
|
| -# Open the database
|
| -#
|
| -sqlite db [lindex $argv 0]
|
| -set DB [btree_open [lindex $argv 0]]
|
| -
|
| -# Output the schema for the generated report
|
| -#
|
| -puts \
|
| -{BEGIN;
|
| -CREATE TABLE space_used(
|
| - name clob, -- Name of a table or index in the database file
|
| - is_index boolean, -- TRUE if it is an index, false for a table
|
| - payload int, -- Total amount of data stored in this table or index
|
| - pri_pages int, -- Number of primary pages used
|
| - ovfl_pages int, -- Number of overflow pages used
|
| - pri_unused int, -- Number of unused bytes on primary pages
|
| - ovfl_unused int -- Number of unused bytes on overflow pages
|
| -);}
|
| -
|
| -# This query will be used to find the root page number for every index and
|
| -# table in the database.
|
| -#
|
| -set sql {
|
| - SELECT name, type, rootpage FROM sqlite_master
|
| - UNION ALL
|
| - SELECT 'sqlite_master', 'table', 2
|
| - ORDER BY 1
|
| -}
|
| -
|
| -# Initialize variables used for summary statistics.
|
| -#
|
| -set total_size 0
|
| -set total_primary 0
|
| -set total_overflow 0
|
| -set total_unused_primary 0
|
| -set total_unused_ovfl 0
|
| -
|
| -# Analyze every table in the database, one at a time.
|
| -#
|
| -foreach {name type rootpage} [db eval $sql] {
|
| - set cursor [btree_cursor $DB $rootpage 0]
|
| - set go [btree_first $cursor]
|
| - set size 0
|
| - catch {unset pg_used}
|
| - set unused_ovfl 0
|
| - set n_overflow 0
|
| - while {$go==0} {
|
| - set payload [btree_payload_size $cursor]
|
| - incr size $payload
|
| - set stat [btree_cursor_dump $cursor]
|
| - set pgno [lindex $stat 0]
|
| - set freebytes [lindex $stat 4]
|
| - set pg_used($pgno) $freebytes
|
| - if {$payload>238} {
|
| - set n [expr {($payload-238+1019)/1020}]
|
| - incr n_overflow $n
|
| - incr unused_ovfl [expr {$n*1020+238-$payload}]
|
| - }
|
| - set go [btree_next $cursor]
|
| - }
|
| - btree_close_cursor $cursor
|
| - set n_primary [llength [array names pg_used]]
|
| - set unused_primary 0
|
| - foreach x [array names pg_used] {incr unused_primary $pg_used($x)}
|
| - regsub -all ' $name '' name
|
| - puts -nonewline "INSERT INTO space_used VALUES('$name'"
|
| - puts -nonewline ",[expr {$type=="index"}]"
|
| - puts ",$size,$n_primary,$n_overflow,$unused_primary,$unused_ovfl);"
|
| - incr total_size $size
|
| - incr total_primary $n_primary
|
| - incr total_overflow $n_overflow
|
| - incr total_unused_primary $unused_primary
|
| - incr total_unused_ovfl $unused_ovfl
|
| -}
|
| -
|
| -# Output summary statistics:
|
| -#
|
| -puts "-- Total payload size: $total_size"
|
| -puts "-- Total pages used: $total_primary primary and $total_overflow overflow"
|
| -set file_pgcnt [expr {[file size [lindex $argv 0]]/1024}]
|
| -puts -nonewline "-- Total unused bytes on primary pages: $total_unused_primary"
|
| -if {$total_primary>0} {
|
| - set upp [expr {$total_unused_primary/$total_primary}]
|
| - puts " (avg $upp bytes/page)"
|
| -} else {
|
| - puts ""
|
| -}
|
| -puts -nonewline "-- Total unused bytes on overflow pages: $total_unused_ovfl"
|
| -if {$total_overflow>0} {
|
| - set upp [expr {$total_unused_ovfl/$total_overflow}]
|
| - puts " (avg $upp bytes/page)"
|
| -} else {
|
| - puts ""
|
| -}
|
| -set n_free [expr {$file_pgcnt-$total_primary-$total_overflow}]
|
| -if {$n_free>0} {incr n_free -1}
|
| -puts "-- Total pages on freelist: $n_free"
|
| -puts "COMMIT;"
|
|
|