This issue partially addresses #2383. When user merges a lot of data into one value, its size might grow indefinitely. When user gets the value as byte[] in java client, its actual merged size might exceed the JVM limitation for returned...
继续重复步骤2,不断扩展数组长度。 // 继续扩展数组长度byteArray=Arrays.copyOf(byteArray,byteArray.length+10); 1. 2. 步骤4:超出最大范围 当不断扩展数组长度直至超出最大范围时,会抛出OutOfMemoryError异常。 // 继续扩展数组长度,直到超出最大范围byteArray=Arrays.copyOf(byteArray,Integer.MAX_VALUE+1)...
ByteArrayOutputStream类中有3个成员变量buf[]、count和MAX_ARRAY_SIZE,其定义如下: /** * 字节数组. */ protected byte buf[]; /** * 字节数组大小. */ protected int count; /** 最大数组大小 */ private static final int MAX_ARRAY_SIZE = Integer.MAX_VALUE - 8; 1. 2. 3. 4. 5. 6. ...
}privatestaticfinalintMAX_ARRAY_SIZE=Integer.MAX_VALUE -8;privatevoidgrow(intminCapacity){// overflow-conscious codeintoldCapacity=buf.length;intnewCapacity=oldCapacity <<1;if(newCapacity - minCapacity <0) newCapacity = minCapacity;if(newCapacity - MAX_ARRAY_SIZE >0) newCapacity = hugeCapacity...
down(max_jint-header_size(type),MinObjAlignment);}return(int32_t)max_elements_per_size_t;}}...
/*jdk6中，修改JVM内存大小：-XX:PermSize=6m -XX:MaxPermSize=6m -Xms6m -Xmx6m*/publicclass...
if (newCapacity - MAX_ARRAY_SIZE > 0) newCapacity = hugeCapacity(minCapacity); buf =Arrays.copyOf(buf, newCapacity); } buf 的长度的增长不一定是按字符bytes长度增加的,而是按原有长度右移1位后增加的! PS:导致原先500M的数据,在写入ByteArrayOutputStream后实际内存占用到800M左右......
max(i, 127); // Maximum array size is Integer.MAX_VALUE h = Math.min(i, Integer.MAX_VALUE - (-low) -1); } catch( NumberFormatException nfe) { // If the property cannot be parsed into an int, ignore it. } } high = h; cache = new Integer[(high - low) + 1]; int j =...
java程序最大可能占用内存=-Xmx指定的最大堆内存大小+最大活跃线程数量*-Xss指定的每个线程栈内存大小+-XX:MaxDirectMemorySize指定的最大直接内存大小+MetaSpace大小 1. 堆栈内存 堆栈内存指的是堆内存和栈内存:堆内存是GC管理的内存,栈内存是线程内存。
The same behavior can be observed forbyte,boolean,long, and other data types in the array, and the results are the same. 3.ArraySupport ArraysSupportis a utility class in OpenJDK, which suggests having themaximum sizeasInteger.MAX_VALUE– 8to make it work withall the JDK versions and imp...