redis并发量最大是多少

<?phprequire "vendor/autoload.php";$client = new Predis\Client([

'scheme' => 'tcp',

'host' => '127.0.0.1',

'port' => 6379,]);for ($i = 0; $i < 1000; $i++) { $client->incr("name");

$client->expire("name", 10800);

usleep(10000);}

<?phprequire "vendor/autoload.php";$client = new Predis\Client([

'scheme' => 'tcp',

'host' => '127.0.0.1',

'port' => 6379,]);class RedisLock{ public $objRedis = null;

public $timeout = 3;

/** * @desc 设置redis实例 * * @param obj object | redis实例 */

public function __construct($obj)

{ $this->objRedis = $obj;

} /** * @desc 获取锁键名 */

public function getLockCacheKey($key)

{ return "lock_{$key}";

} /** * @desc 获取锁 * * @param key string | 要上锁的键名 * @param timeout int | 上锁时间 */

public function getLock($key, $timeout = NULL)

{ $timeout = $timeout ? $timeout : $this->timeout;

$lockCacheKey = $this->getLockCacheKey($key);

$expireAt = time() + $timeout;

$isGet = (bool)$this->objRedis->setnx($lockCacheKey, $expireAt);

if ($isGet) { return $expireAt;

} while (1) { usleep(10);

$time = time();

$oldExpire = $this->objRedis->get($lockCacheKey);

if ($oldExpire >= $time) { continue;

} $newExpire = $time + $timeout;

$expireAt = $this->objRedis->getset($lockCacheKey, $newExpire);

if ($oldExpire != $expireAt) { continue;

} $isGet = $newExpire;

break;

} return $isGet;

} /** * @desc 释放锁 * * @param key string | 加锁的字段 * @param newExpire int | 加锁的截止时间 * * @return bool | 是否释放成功 */

public function releaseLock($key, $newExpire)

{ $lockCacheKey = $this->getLockCacheKey($key);

if ($newExpire >= time()) { return $this->objRedis->del($lockCacheKey);

} return true;

}

}$start_time = microtime(true);$lock = new RedisLock($client);$key = "name";for ($i = 0; $i < 10000; $i++) { $newExpire = $lock->getLock($key);

$num = $client->get($key);

$num++;

$client->set($key, $num);

$lock->releaseLock($key, $newExpire);}$end_time = microtime(true);echo "花费时间 ： ". ($end_time - $start_time) . "\n";

$ 花费时间 ： 4.3004920482635

[2] + 72356 done php setnx.php# root @ ritoyan-virtual-pc in ~/PHP/redis-high-concurrency [20:23:41] $ 花费时间 ： 4.4319710731506

[1] + 72355 done php setnx.php