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Filter in use tables at MySQL server to improve performance on big servers

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Signed-off-by: Michal Čihař <michal@cihar.com>
This commit is contained in:
Michal Čihař 2016-04-07 08:46:43 +02:00
parent e9386bc623
commit 338686589b
1 changed files with 2 additions and 5 deletions
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7
libraries/Util.php
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@ -4652,7 +4652,7 @@ class Util
// Special speedup for newer MySQL Versions (in 4.0 format changed)
if (true === $cfg['SkipLockedTables']) {
$db_info_result = $GLOBALS['dbi']->query(
'SHOW OPEN TABLES FROM ' . Util::backquote($db) . ';'
'SHOW OPEN TABLES FROM ' . Util::backquote($db) . ' WHERE In_use > 0;'
);
// Blending out tables in use
@ -4786,10 +4786,7 @@ class Util
$sot_cache = $tables = array();
while ($tmp = $GLOBALS['dbi']->fetchAssoc($db_info_result)) {
// if in use, memorize table name
if ($tmp['In_use'] > 0) {
$sot_cache[$tmp['Table']] = true;
}
$sot_cache[$tmp['Table']] = true;
}
$GLOBALS['dbi']->freeResult($db_info_result);