Juniper Networks Interview Question Software Engineer / Developers
0of 0 votesExplain Memory Fragmentation
Explain Memory Fragmentation
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In computer storage, fragmentation is a phenomenon in which storage space is used inefficiently, reducing storage capacity and in most cases performance. The term is also used to denote the wasted space itself.
- someone September 18, 2009There are three different but related forms of fragmentation: external fragmentation, internal fragmentation, and data fragmentation. Various storage allocation schemes exhibit one or more of these weaknesses.
Internal fragmentation occurs when storage is allocated without ever intending to use it.[1] This space is wasted. While this seems foolish, it is often accepted in return for increased efficiency or simplicity. The term "internal" refers to the fact that the unusable storage is inside the allocated region but is not being used.
External fragmentation is the phenomenon in which free storage becomes divided into many small pieces over time.
Data fragmentation occurs when a piece of data in memory is broken up into many pieces that are not close together. It is typically the result of attempting to insert a large object into storage that has already suffered external fragmentation.