What is the difference between buffer and cache memory in Linux?

by

Buffers are associated with a specific block device, and cover caching
of filesystem metadata as well as tracking in-flight pages. The cache
only contains parked file data. That is, the buffers remember what’s
in directories, what file permissions are, and keep track of what
memory is being written from or read to for a particular block device.
The cache only contains the contents of the files themselves.

quote link

More Related Contents:

  1. How can I measure the actual memory usage of an application or process?
  2. Is there any API for determining the physical address from virtual address in Linux?
  3. How to access physical addresses from user space in Linux?
  4. Why does a JVM report more committed memory than the linux process resident set size?
  5. How to find out which processes are using swap space in Linux?
  6. Contiguous physical memory from userspace
  7. How is Stack memory allocated when using ‘push’ or ‘sub’ x86 instructions?
  8. A way to determine a process’s “real” memory usage, i.e. private dirty RSS?
  9. How to find the socket buffer size of linux
  10. Direct Memory Access in Linux
  11. Understanding the Linux oom-killer’s logs
  12. How to get the percentage of memory free with a Linux command? [closed]
  13. Specifying UDP receive buffer size at runtime in Linux
  14. Is there a way for non-root processes to bind to “privileged” ports on Linux?
  15. How to make an executable ELF file in Linux using a hex editor?
  16. Separately redirecting and recombining stderr/stdout without losing ordering
  17. Print a file, skipping the first X lines, in Bash [duplicate]
  18. Limit jvm process memory on ubuntu
  19. why is the output of `du` often so different from `du -b`
  20. Running a cron job on Linux every six hours
  21. Shebang line limit in bash and linux kernel
  22. Error on execution -version `Qt_5′ not found required by
  23. What is the status of POSIX asynchronous I/O (AIO)?
  24. Randomly shuffling lines in Linux / Bash
  25. What is the proper way to use inotify?
  26. How can I get the source code for the linux utility tail?
  27. How do applications resolve to different versions of shared libraries at run time?
  28. What is PATH on a Mac (UNIX) system?
  29. How to add Chromedriver to PATH in linux?
  30. Linux x64: why does r10 come before r8 and r9 in syscalls?

Leave a Comment