Memcache::setCompressThreshold()
(PECL memcache >= 2.0.0)
开启大值自动压缩
说明
Memcache::setCompressThreshold(int $threshold[,float $min_savings]): bool
Memcache::setCompressThreshold()开启对于大值的自动压缩。同样你也可以使用函数memcache_set_compress_threshold()。
Note:此函数在memcache2.0.0加入。
参数
- $threshold
控制多大值进行自动压缩的阈值。
- $min_saving
指定经过压缩实际存储的值的压缩率,支持的值必须在0和1之间。默认值是0.2表示20%压缩率。
返回值
成功时返回TRUE
,或者在失败时返回FALSE
。
范例
Example #1 Memcache::setCompressThreshold()示例
<?php /* OO API */ $memcache_obj = new Memcache; $memcache_obj->addServer('memcache_host', 11211); $memcache_obj->setCompressThreshold(20000, 0.2); /* procedural API */ $memcache_obj = memcache_connect('memcache_host', 11211); memcache_set_compress_threshold($memcache_obj, 20000, 0.2); ?>
The strangest thing is that you don't supply a server as parameter to setCompressThreshold(), so the value should be related to the memcache module, not the server itself. However it's required that you have added a server before you can set compress threshold. The documentation does not specify if the servers that are added after the call to this function will have the set value. I would test it and post, but since it's not documented the behavior could change. So if you want to be sure -> set the threshold every time you add a server.