5 ms·

It is not that simple regarding ECC. Since ZFS uses more memory, the probability of hitting a memory bug is simply higher with it.

• amarshall 5y ago
  But it doesn’t really use more memory. The ARC gives the impression of high memory usage because it’s different than the OS page cache and usually called out explicitly and not ignored in many monitoring tools like the OS cache is. Linux—without ZFS—will happily consume nearly all RAM with any filesystem if enough data is read and written.
  • dsr_ 5y ago
    This is correct. Any filesystem using the kernel's filesystem cache will do this, too. For a long running, non-idle system, a good rule of thumb is that all RAM not being actively used is being used by evictable caching.
    • zerd 5y ago
      A colleague who was used to other UNIXes was transitioning to Linux for a database. He saw in free that used was more at more than 90%, so he added more ram. But to his surprise it was still using 90%! He kept adding ram. I told him that he had to subtract the buffer and cached values (this was before free had the Available column).
      • Brian-Puccio 5y ago
        https://www.linuxatemyram.com/ https://www.linuxatemyram.com/ is one of my favorite single-serving sites.
      • mark-wagner 5y ago
        Before the Available column there was the -/+ buffers/cache line that provided the same information. Maybe it was too confusing. total used free shared buffers cached Mem: 12286456 11715372 571084 0 81912 6545228 -/+ buffers/cache: 5088232 7198224 Swap: 24571408 54528 24516880