Uploaded image for project: 'IMPALA'
  1. IMPALA
  2. IMPALA-5229

Try using TCMalloc + Huge Pages for buffers

    Details

      Description

      As well as mmap() + huge pages, we could support TCMalloc + huge pages. I believe TCMalloc will support this well because:

      • We can allocate huge-page-aligned memory via posix_memalign()
      • TCMalloc, by default, always decommits large allocations upon freeing them. So if we undo the HUGEPAGE madvise() before handing the pages back to TCMalloc, then TCMalloc will decommit the huge pages backing the allocation, and we won't get TCMalloc's page heap into a weird state.

      This could give us the perf benefits of huge pages without some of the headaches associated with using mmap() directly.

        Attachments

          Issue Links

            Activity

              People

              • Assignee:
                tarmstrong Tim Armstrong
                Reporter:
                tarmstrong Tim Armstrong
              • Votes:
                0 Vote for this issue
                Watchers:
                1 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved: