从HBase offheap到Netty的内存管理 - 匠心零度博客

[jiangxinlingdu]

http://www.jiangxinlingdu.com/netty/2019/04/27/pooledbytebufallocator.html

Netty的内存管理其实做的很精细,我们一起来看看吧！

[jiangxinlingdu]

针对第二幅图，关于Nomal缓存大小，并不是图二里面的16M最大，源代码里面最大仅仅是可以缓存到32k而已，源码如下：

 // 32 kb is the default maximum capacity of the cached buffer. Similar to what is explained in
        // 'Scalable memory allocation using jemalloc'
        DEFAULT_MAX_CACHED_BUFFER_CAPACITY = SystemPropertyUtil.getInt(
                "io.netty.allocator.maxCachedBufferCapacity", 32 * 1024);