Bottleneck

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A bottleneck is the slowest operation in a set of operations. It is important to identify the bottleneck in computer systems to know what needs to be tuned to provide better performance and scalability.

Some examples:

  • The I/O system may become a bottleneck on a large database system;
  • If a database used more memory than what's available, paging and swapping will become a bottleneck;
  • In a RAC system the interconnect may be overloaded (cannot handle all data transfers).

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