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add an option for max number of sleeping threads

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This commit is contained in:
Brian Quinion 2012-12-08 18:55:17 +00:00
parent 02e7cfd6f4
commit fa90ece530
4 changed files with 32 additions and 4 deletions
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18
lib/init-website.php
View File

@ -18,9 +18,25 @@
CONST_ConnectionBucket_LeakRate, CONST_ConnectionBucket_BlockLimit);
if ($fBucketVal > CONST_ConnectionBucket_WaitLimit && $fBucketVal < CONST_ConnectionBucket_BlockLimit)
{
$m = getBucketMemcache();
$iCurrentSleeping = $m->increment('sleepCounter');
if (false === $iCurrentSleeping)
{
$m->add('sleepCounter', 0);
$iCurrentSleeping = $m->increment('sleepCounter');
}
if ($iCurrentSleeping >= CONST_ConnectionBucket_MaxSleeping)
{
// Too many threads sleeping already. This becomes a hard block.
$fBucketVal = doBucket($aBucketKeys, CONST_ConnectionBucket_BlockLimit, CONST_ConnectionBucket_LeakRate, CONST_ConnectionBucket_BlockLimit);
}
else
{
sleep(($fBucketVal - CONST_ConnectionBucket_WaitLimit)/CONST_ConnectionBucket_LeakRate);
$fBucketVal = doBucket($aBucketKeys, 0, 0, CONST_ConnectionBucket_BlockLimit);
$fBucketVal = doBucket($aBucketKeys, CONST_ConnectionBucket_LeakRate, CONST_ConnectionBucket_LeakRate, CONST_ConnectionBucket_BlockLimit);
}
$m->decrement('sleepCounter');
}
if (strpos(CONST_BlockedIPs, ','.$_SERVER["REMOTE_ADDR"].',') !== false || $fBucketVal >= CONST_ConnectionBucket_BlockLimit)

5
lib/lib.php
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@ -919,9 +919,14 @@
function getBucketMemcache()
{
static $m;
if (!CONST_ConnectionBucket_MemcacheServerAddress) return null;
if (!isset($m))
{
$m = new Memcached();
$m->addServer(CONST_ConnectionBucket_MemcacheServerAddress, CONST_ConnectionBucket_MemcacheServerPort);
}
return $m;
}

3
settings/settings.php
View File

@ -20,10 +20,13 @@
@define('CONST_ConnectionBucket_LeakRate', 1);
@define('CONST_ConnectionBucket_BlockLimit', 10);
@define('CONST_ConnectionBucket_WaitLimit', 6);
@define('CONST_ConnectionBucket_MaxSleeping', 10);
@define('CONST_ConnectionBucket_Cost_Reverse', 1);
@define('CONST_ConnectionBucket_Cost_Search', 2);
@define('CONST_ConnectionBucket_Cost_Details', 3);
// Override this function to add an adjustment factor to the cost
// based on server load. e.g. getBlockingProcesses
if (!function_exists('user_busy_cost'))
{
function user_busy_cost()

4
utils/blocks.php
View File

@ -23,6 +23,9 @@
if ($aResult['list'])
{
$iCurrentSleeping = $m->get('sleepCounter');
echo "\n Sleeping blocks count: $iCurrentSleeping\n";
$aBlocks = getBucketBlocks();
echo "\n";
printf(" %-40s | %12s | %7s | %13s | %16s | %31s\n", "Key", "Total Blocks", "Current", "Still Blocked", "Last Req Blocked", "Last Block Time");
@ -36,5 +39,6 @@
if ($aResult['delete'])
{
$m->set('sleepCounter', 0);
clearBucketBlocks();
}