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sqlite3

    1: # 2007 May 17
    2: #
    3: # The author disclaims copyright to this source code.  In place of
    4: # a legal notice, here is a blessing:
    5: #
    6: #    May you do good and not evil.
    7: #    May you find forgiveness for yourself and forgive others.
    8: #    May you share freely, never taking more than you give.
    9: #
   10: #*************************************************************************
   11: # This file implements regression tests for SQLite library. The 
   12: # focus of this script is testing that the overflow-page related
   13: # enhancements added after version 3.3.17 speed things up.
   14: #
   15: # $Id: speed3.test,v 1.1.1.1 2012/02/21 17:04:16 misho Exp $
   16: #
   17: 
   18: #---------------------------------------------------------------------
   19: # Test plan:
   20: #
   21: # If auto-vacuum is enabled for the database, the following cases
   22: # should show performance improvement with respect to 3.3.17.
   23: #
   24: #   + When deleting rows that span overflow pages. This is faster
   25: #     because the overflow pages no longer need to be read before
   26: #     they can be moved to the free list (test cases speed3-1.X). 
   27: #
   28: #   + When reading a column value stored on an overflow page that
   29: #     is not the first overflow page for the row. The improvement
   30: #     in this case is because the overflow pages between the tree
   31: #     page and the overflow page containing the value do not have
   32: #     to be read (test cases speed3-2.X).
   33: #
   34: 
   35: set testdir [file dirname $argv0]
   36: source $testdir/tester.tcl
   37: 
   38: ifcapable !tclvar||!attach {
   39:   finish_test
   40:   return
   41: }
   42: 
   43: speed_trial_init speed1
   44: 
   45: # Set a uniform random seed
   46: expr srand(0)
   47: 
   48: set ::NROW 1000
   49: 
   50: # The number_name procedure below converts its argment (an integer)
   51: # into a string which is the English-language name for that number.
   52: #
   53: # Example:
   54: #
   55: #     puts [number_name 123]   ->  "one hundred twenty three"
   56: #
   57: set ones {zero one two three four five six seven eight nine
   58:           ten eleven twelve thirteen fourteen fifteen sixteen seventeen
   59:           eighteen nineteen}
   60: set tens {{} ten twenty thirty forty fifty sixty seventy eighty ninety}
   61: proc number_name {n} {
   62:   if {$n>=1000} {
   63:     set txt "[number_name [expr {$n/1000}]] thousand"
   64:     set n [expr {$n%1000}]
   65:   } else {
   66:     set txt {}
   67:   }
   68:   if {$n>=100} {
   69:     append txt " [lindex $::ones [expr {$n/100}]] hundred"
   70:     set n [expr {$n%100}]
   71:   }
   72:   if {$n>=20} {
   73:     append txt " [lindex $::tens [expr {$n/10}]]"
   74:     set n [expr {$n%10}]
   75:   }
   76:   if {$n>0} {
   77:     append txt " [lindex $::ones $n]"
   78:   }
   79:   set txt [string trim $txt]
   80:   if {$txt==""} {set txt zero}
   81:   return $txt
   82: }
   83: 
   84: proc populate_t1 {db} {
   85:   $db transaction {
   86:     for {set ii 0} {$ii < $::NROW} {incr ii} {
   87:       set N [number_name $ii]
   88:       set repeats [expr {(10000/[string length $N])+1}]
   89:       set text [string range [string repeat $N $repeats] 0 10000]
   90:       $db eval {INSERT INTO main.t1 VALUES($ii, $text, $ii)}
   91:     }
   92:     $db eval {INSERT INTO aux.t1 SELECT * FROM main.t1}
   93:   }
   94: }
   95: 
   96: 
   97: proc io_log {db} {
   98:   db_enter db
   99:   array set stats1 [btree_pager_stats [btree_from_db db]]
  100:   array set stats2 [btree_pager_stats [btree_from_db db 2]]
  101:   db_leave db
  102: # puts "1: [array get stats1]"
  103: # puts "2: [array get stats2]"
  104:   puts "Incrvacuum: Read $stats1(read), wrote $stats1(write)"
  105:   puts "Normal    : Read $stats2(read), wrote $stats2(write)"
  106: }
  107: 
  108: proc reset_db {} {
  109:   db close
  110:   sqlite3 db test.db
  111:   db eval { 
  112:     PRAGMA main.cache_size = 200000;
  113:     PRAGMA main.auto_vacuum = 'incremental';
  114:     ATTACH 'test2.db' AS 'aux'; 
  115:     PRAGMA aux.auto_vacuum = 'none';
  116:   }
  117: }
  118: 
  119: forcedelete test2.db test2.db-journal
  120: reset_db
  121: 
  122: # Set up a database in auto-vacuum mode and create a database schema.
  123: #
  124: do_test speed3-0.1 {
  125:   execsql {
  126:     CREATE TABLE main.t1(a INTEGER, b TEXT, c INTEGER);
  127:   }
  128:   execsql {
  129:     SELECT name FROM sqlite_master ORDER BY 1;
  130:   }
  131: } {t1}
  132: do_test speed3-0.2 {
  133:   execsql {
  134:     CREATE TABLE aux.t1(a INTEGER, b TEXT, c INTEGER);
  135:   }
  136:   execsql {
  137:     SELECT name FROM aux.sqlite_master ORDER BY 1;
  138:   }
  139: } {t1}
  140: do_test speed3-0.3 {
  141:   populate_t1 db
  142:   execsql {
  143:     SELECT count(*) FROM main.t1;
  144:     SELECT count(*) FROM aux.t1;
  145:   }
  146: } "$::NROW $::NROW"
  147: do_test speed3-0.4 {
  148:   execsql {
  149:     PRAGMA main.auto_vacuum;
  150:     PRAGMA aux.auto_vacuum;
  151:   }
  152: } {2 0}
  153: 
  154: # Delete all content in a table, one row at a time.
  155: #
  156: #io_log db
  157: reset_db
  158: speed_trial speed3-1.incrvacuum $::NROW row {DELETE FROM main.t1 WHERE 1}
  159: speed_trial speed3-1.normal     $::NROW row {DELETE FROM aux.t1 WHERE 1}
  160: io_log db
  161: 
  162: # Select the "C" column (located at the far end of the overflow 
  163: # chain) from each table row.
  164: #
  165: #db eval {PRAGMA incremental_vacuum(500000)}
  166: populate_t1 db
  167: reset_db
  168: speed_trial speed3-2.incrvacuum $::NROW row {SELECT c FROM main.t1}
  169: speed_trial speed3-2.normal     $::NROW row {SELECT c FROM aux.t1}
  170: io_log db
  171: 
  172: finish_test