westonpace commented on a change in pull request #10186:
URL: https://github.com/apache/arrow/pull/10186#discussion_r624104610
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File path: cpp/src/arrow/memory_pool.cc
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@@ -300,6 +302,8 @@ class JemallocAllocator {
dallocx(ptr, MALLOCX_ALIGN(kAlignment));
}
}
+
+ static void ReleaseUnused() {}
Review comment:
I added a jemalloc implementation. It does not appear to do anything in
my manual testing but it is possible that jemalloc was simply just already
releases pages to the OS. Since this is best-effort anyways I think it is ok.
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