浅析关于PHP中Sphinx长连接问题
关于什么是Sphinx这里我不不介绍了大家可百度查一下,下面我来介绍的是关于PHP中Sphinx长连接问题解析,希望些文章对各位朋友有帮助.
SphinxClient::open
(PECL sphinx >= 1.0.3)
SphinxClient::open — 建立到搜索服务端的持久连接
说明: public bool SphinxClient::open(void)
建立到搜索服务端的持久连接.
参数:此函数没有参数.
返回值:成功时返回 TRUE,或者在失败时返回 FALSE.
今日在做PHP系统代码优化时,对sphinx的长连接做了一些分析发现php的sphinx api并不是我们想象中的那样会在php-fpm的fastcgi状态下一直与sphinx的searchd进程保持长连接,sphinx的api接口中open()方法仅仅提供了在一次会话请求中保证多个sphinx调用在单个php进程中是共用一个sphinx tcp连接通道,当php解释运行完,与sphinx的连接也会自动断开,而不是保持连接状态.
> So it seems that the definition of 'persistent connection' in Sphinx is different from > persistent MySql connections when using a PhP API : the persistence is only across > multiple calls *in the same php request execution* and not persistence within the client > process i.e. across multiple php requests.我们可以做一个这样的实验来证明我的观点,给php增加sphinx.so扩展,然后写如下测试代码:
$s = new SphinxClient(); //开源代码phpfensi测试数据 var_dump( $s ); $s ->setServer( '192.168.1.108' , '9312' ); //$s->open(); var_dump( $s ->query( 'abxxxx' )); var_dump( $s ->query( 'abxxxx' ));注意这里$s->open()先屏蔽,然后我们在cli状态下利用strace命令跟踪执行此php脚本,收集系统调用信息会发现.
在系统调用中出现了两次connect到192.168.1.108的请求,也就是说在没调用open方法的时候,在同一个php运行时中会导致两次对sphinx产生的tcp请求.
611 fcntl64(3, F_SETFL, O_RDONLY|O_NONBLOCK) = 0 612 connect(3, {sa_family=AF_INET, sin_port=htons(9312), sin_addr=inet_addr( "192.168.1.108" )}, 16) = -1 EINPROGRESS (Operation now in progress) 613 select(4, NULL, [3], NULL, {60, 0}) = 1 (out [3], left {59, 999996}) 614 fcntl64(3, F_SETFL, O_RDONLY) = 0 615 send(3, "1" , 4, MSG_NOSIGNAL) = 4 616 recv(3, "1" , 4, 0) = 4 617 send(3, "1312241" , 16, MSG_NOSIGNAL) = 16 618 send(3, "246abxx" ..., 140, MSG_NOSIGNAL) = 140 619 recv(3, "131`" , 8, 0) = 8 620 recv(3, "25title4text2" ..., 96, 0) = 96 621 close(3) 。。。。。。。。。。。。。。。。。。。 。。。。。。。。。。。。。。。。。。。 756 socket(PF_INET, SOCK_STREAM, IPPROTO_IP) = 3 757 fcntl64(3, F_SETFL, O_RDONLY|O_NONBLOCK) = 0 758 connect(3, {sa_family=AF_INET, sin_port=htons(9312), sin_addr=inet_addr( "192.168.1.108" )}, 16) = -1 EINPROGRESS (Operation now in progress) 759 select(4, NULL, [3], NULL, {60, 0}) = 1 (out [3], left {59, 999997}) 760 fcntl64(3, F_SETFL, O_RDONLY) = 0 761 send(3, "1" , 4, MSG_NOSIGNAL) = 4 762 recv(3, "1" , 4, 0) = 4 763 send(3, "1312241" , 16, MSG_NOSIGNAL) = 16 764 send(3, "246abxx" ..., 140, MSG_NOSIGNAL) = 140 765 recv(3, "131`" , 8, 0) = 8 766 recv(3, "25title4text2" ..., 96, 0) = 96 767 close(3) = 0 768 write(1, "array(9) {n" , 11array(9) {然后我们取消open调用的注释,继续strace,会发现这时候依然是连续调用两次query方法,但在第一次query调用后api不会立即close掉tcp连接,而是继续给到第二次query调用使用.
611 fcntl64(3, F_SETFL, O_RDONLY|O_NONBLOCK) = 0 612 connect(3, {sa_family=AF_INET, sin_port=htons(9312), sin_addr=inet_addr( "192.168.1.108" )}, 16) = -1 EINPROGRESS (Operation now in progress) 613 select(4, NULL, [3], NULL, {60, 0}) = 1 (out [3], left {59, 999996}) 614 fcntl64(3, F_SETFL, O_RDONLY) = 0 615 send(3, "1" , 4, MSG_NOSIGNAL) = 4 616 recv(3, "1" , 4, 0) = 4 617 send(3, "441" , 12, MSG_NOSIGNAL) = 12 618 select(4, [3], NULL, [3], {0, 0}) = 0 (Timeout) 619 send(3, "1312241" , 16, MSG_NOSIGNAL) = 16 620 send(3, "246abxx" ..., 140, MSG_NOSIGNAL) = 140 621 recv(3, "131`" , 8, 0) = 8 622 recv(3, "25title4text2" ..., 96, 0) = 96 623 write(1, "array(9) {n" , 11array(9) { 624 ) = 11查看更多关于浅析关于PHP中Sphinx长连接问题 - php高级应用的详细内容...
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