85 lines
2.6 KiB
Plaintext
85 lines
2.6 KiB
Plaintext
# 2013 March 20
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#
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# The author disclaims copyright to this source code. In place of
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# a legal notice, here is a blessing:
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#
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# May you do good and not evil.
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# May you find forgiveness for yourself and forgive others.
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# May you share freely, never taking more than you give.
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#
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#***********************************************************************
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#
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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source $testdir/lock_common.tcl
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set testprefix mmap1
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proc nRead {db} {
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set bt [btree_from_db $db]
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db_enter $db
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array set stats [btree_pager_stats $bt]
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db_leave $db
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return $stats(read)
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}
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foreach {t mmap_size nRead} {
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1 { PRAGMA mmap_size = -65536 } 4
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2 { PRAGMA mmap_size = -50 } 156
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3 { PRAGMA mmap_size = 0 } 344
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} {
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do_multiclient_test tn {
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sql1 $mmap_size
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code2 {
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set ::rcnt 0
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proc rblob {n} {
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set ::rcnt [expr (($::rcnt << 3) + $::rcnt + 456) & 0xFFFFFFFF]
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set str [format %.8x [expr $::rcnt ^ 0xbdf20da3]]
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string range [string repeat $str [expr $n/4]] 1 $n
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}
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db2 func rblob rblob
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}
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sql2 {
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PRAGMA auto_vacuum = 1;
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CREATE TABLE t1(a, b, UNIQUE(a, b));
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INSERT INTO t1 VALUES(rblob(500), rblob(500));
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INSERT INTO t1 SELECT rblob(500), rblob(500) FROM t1; -- 2
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INSERT INTO t1 SELECT rblob(500), rblob(500) FROM t1; -- 4
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INSERT INTO t1 SELECT rblob(500), rblob(500) FROM t1; -- 8
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INSERT INTO t1 SELECT rblob(500), rblob(500) FROM t1; -- 16
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INSERT INTO t1 SELECT rblob(500), rblob(500) FROM t1; -- 32
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}
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do_test $t.$tn.1 {
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sql1 "SELECT count(*) FROM t1; PRAGMA integrity_check ; PRAGMA page_count"
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} {32 ok 77}
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# Have connection 2 shrink the file. Check connection 1 can still read it.
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sql2 { DELETE FROM t1 WHERE rowid%2; }
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do_test $t.$tn.2 {
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sql1 "SELECT count(*) FROM t1; PRAGMA integrity_check ; PRAGMA page_count"
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} {16 ok 42}
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# Have connection 2 grow the file. Check connection 1 can still read it.
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sql2 { INSERT INTO t1 SELECT rblob(500), rblob(500) FROM t1 }
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do_test $t.$tn.3 {
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sql1 "SELECT count(*) FROM t1; PRAGMA integrity_check ; PRAGMA page_count"
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} {32 ok 79}
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# Have connection 2 grow the file again. Check connection 1 is still ok.
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sql2 { INSERT INTO t1 SELECT rblob(500), rblob(500) FROM t1 }
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do_test $t.$tn.4 {
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sql1 "SELECT count(*) FROM t1; PRAGMA integrity_check ; PRAGMA page_count"
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} {64 ok 149}
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# Check that the number of pages read by connection 1 indicates that the
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# "PRAGMA mmap_size" command worked.
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do_test $t.$tn.5 { nRead db } $nRead
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}
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}
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finish_test
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