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05 - Buffer Pools + Memory Management (CMU Databases Systems / Fall 2019)

CMU Database Group

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  • Presented by Andy Pavlo, CMU
  • Linked in the descriptionSlides on 15445.courses.cs.cmu.edu

Intermediate. Assumes working knowledge.

44K views7 years ago

Databases and dataSystems programmingDatabase internalsMemory management

Andy Pavlo explains how database management systems manage memory and cache pages using buffer pools.

Prof. Andy Pavlo (cs.cmu.edu/~pavlo/) Slides: 15445.courses.cs.cmu.edu/fall2019/slides/05-bufferpool.pdf Notes 15445.courses.cs.cmu.edu/fall2019/notes/05-bufferpool.pdf 15-445/645 Intro to Database Systems (Fall 2019) Carnegie Mellon University 15445.courses.cs.cmu.edu/fall2019/

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u/GrayLiteraturein r/Database • Mentions

Need some clarification on Buffer Pool and Page Table concepts I'm self-learning about DBMSs from the CMU course taught by Andy Pavlo ([video At about 9:20 there is a discussion about Buffer Pools. In my own words, the idea of the Buffer Pool is to have quick access to pages that we want to call, so Andy talks about how the DBMS can pull pages from memory (disk, in this case) and place them into the Buffer Pool. Now, at 9:39, he talks about the need of an indirection layer (i.e., "Page Table"), and it's with the Page Table that I start to get a bit lost. So I am not really sure why the Page Table is needed as an extra layer, and Andy's explanation doesn't seem to really hit home for me…
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