内部和外部碎片之间的区别

操作系统中有两种类型的碎片，它们分别是：内部碎片和外部碎片。

内部碎片：
当内存被拆分为已安装大小的块时，就会发生内部碎片。每当一个方法请求内存时，安装的大小块就会分配给该方法。以防万一分配给方法的内存比请求的内存大一些，那么分配的和请求的内存之间的区别在于内部碎片。

上图清楚地显示了内部碎片，因为分配的内存与所需空间或内存之间的差异称为内部碎片。

外部碎片：
当内存中有足够数量的区域来满足方法的内存请求时，就会发生外部碎片。但是进程的内存请求无法满足，因为提供的内存是在非连续的方式中。无论您应用最适合还是最适合的内存分配策略，它都会导致外部碎片。

在上图中，我们可以看到，有足够的空间 (55 KB) 来运行 process-07(需要 50 KB)，但内存(片段)不是连续的。在这里，我们使用压缩、分页或分段来使用空闲空间来运行进程。

内部碎片和外部碎片之间的区别：-

S.NO	Internal fragmentation	External fragmentation
1.	In internal fragmentation fixed-sized memory, blocks square measure appointed to process.	In external fragmentation, variable-sized memory blocks square measure appointed to method.
2.	Internal fragmentation happens when the method or process is larger than the memory.	External fragmentation happens when the method or process is removed.
3.	The solution of internal fragmentation is best-fit block.	Solution of external fragmentation is compaction, paging and segmentation.
4.	Internal fragmentation occurs when memory is divided into fixed sized partitions.	External fragmentation occurs when memory is divided into variable size partitions based on the size of processes.
5.	The difference between memory allocated and required space or memory is called Internal fragmentation.	The unused spaces formed between non-contiguous memory fragments are too small to serve a new process, is called External fragmentation .