PostgreSQL Internals in Action: Shared Memory and Buffers

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PostgreSQL uses shared memory to expedite access to the database by caching data in memory and to coordinate the execution of requests from multiple standalone Postgres backends/sessions. In this episode, we're looking into shared buffers, one of the areas of shared memory that holds table data for read and write operations.

0:00 Shared memory overview
5:43 Shared buffers in action

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  1. Denis Magda
  2. PostgreSQL
  3. Databases
  4. Shared Memory
  5. Software Engineering
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Another simple and awesome video. Great work pal! I can't wait for the next episode 🍿

MrApalazuelos
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Thanks a lot, very helpful video with crisp and to the point information. One query i had, would be helpful if you can advise.

Isn't a shared memory where multiple database backend processes handling respective client connections and using this shared memory to storedl client database data a security risk ? Considering that in case of some mishandling of shared memory, one compromised backend process can read or modify data of another database handled by another backend process ?

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