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New function to detect heavily used indexes

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This commit is contained in:
Michael 2017-01-13 07:46:47 +00:00
parent b067a11146
commit fd5f151a72
4 changed files with 46 additions and 6 deletions
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38
include/dba.php
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@ -138,6 +138,38 @@ class dba {
return $return;
}
public function log_index($query) {
$a = get_app();
if (($a->config["system"]["db_log_index"] == "") OR ($a->config["system"]["db_log_index_watch"] == "") OR
(intval($a->config["system"]["db_loglimit_index"]) == 0)) {
return;
}
if (strtolower(substr($query, 0, 7)) == "explain") {
return;
}
$r = $this->q("EXPLAIN ".$query);
if (!dbm::is_result($r)) {
return;
}
$watchlist = explode(',', $a->config["system"]["db_log_index_watch"]);
foreach ($r AS $row) {
if (in_array($row['key'], $watchlist) AND
($row['rows'] >= intval($a->config["system"]["db_loglimit_index"]))) {
$backtrace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS);
@file_put_contents($a->config["system"]["db_log_index"], datetime_convert()."\t".
$row['key']."\t".$row['rows']."\t".
basename($backtrace[1]["file"])."\t".
$backtrace[1]["line"]."\t".$backtrace[2]["function"]."\t".
substr($query, 0, 2000)."\n", FILE_APPEND);
}
}
}
public function q($sql, $onlyquery = false) {
$a = get_app();
@ -375,6 +407,9 @@ function q($sql) {
//logger("dba: q: $stmt", LOGGER_ALL);
if ($stmt === false)
logger('dba: vsprintf error: ' . print_r(debug_backtrace(),true), LOGGER_DEBUG);
$db->log_index($stmt);
return $db->q($stmt);
}
@ -408,6 +443,9 @@ function qu($sql) {
$stmt = @vsprintf($sql,$args); // Disabled warnings
if ($stmt === false)
logger('dba: vsprintf error: ' . print_r(debug_backtrace(),true), LOGGER_DEBUG);
$db->log_index($stmt);
$db->q("SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;");
$retval = $db->q($stmt);
$db->q("SET SESSION TRANSACTION ISOLATION LEVEL REPEATABLE READ;");