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static int threadNum = 100;

发生OOM，只剩下两个线程活跃，其他线程驻留

实验3：readBufferSize > MaxDirectMemorySize，readBufferSize < maxCachedBufferSize

static long maxCachedBufferSize = 1024 * 1024 * 2;
static int readBufferSize = 1024 * 1024 * 1;

1、单线程，从文件随机读取一段

读取成功，未观测到

2、单线程，从同一个文件不断读取

读取成功，

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3、循环多线程，从文件随机读取一段

static int threadNum = 5;

读取成功，未观测到

static int threadNum = 100;

成功读取5次后OOM，

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4、循环多线程，从文件不断读取

static int threadNum = 5;

读取成功

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static int threadNum = 100;

只有5个线程活跃，其他线程休眠，未爆OOM

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5、线程池，从文件随机读取一段

static int threadNum = 5;

读取成功，

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static int threadNum = 100;

5个线程读取成功后发生OOM

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6、线程池，从文件不断读取

static int threadNum = 5;

读取成功，

Image Added

static int threadNum = 100;

发生OOM，只有五个线程活跃

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下一步，对参数 TEMP_BUF_POOL_SIZE 进行验证，但现在还没模拟出来。