diff options
| author | Michael Cahill <michael.cahill@mongodb.com> | 2017-07-10 23:33:31 -0400 |
|---|---|---|
| committer | Alex Gorrod <alexander.gorrod@mongodb.com> | 2017-09-07 08:52:53 +1000 |
| commit | 31af5d70a87cf1d99c7275bc8bc01d29e2cb0d2a (patch) | |
| tree | ea27c47def1002f9d85e516fa8d5caf16d8695c9 /src/support/rand.c | |
| parent | 3579adf6c8b96d26898af9fe3cc5eb9677f75632 (diff) | |
| download | mongodb-3.4.9.tar.gz | |
WT-3329 Visit trees using a tiny fraction of cache. (#3442)mongodb-3.4.9
For workloads where no tree takes up a large enough fraction of cache,
we were using a randomized approach to deciding when eviction should
visit trees. That led to slow performance for workloads with uniform
updates over thousands of trees.
(cherry picked from commit 2f1ec98512010f6c92bf27a41180e3c8704b54c8)
Signed-off-by: Alex Gorrod <alexander.gorrod@mongodb.com>
Diffstat (limited to 'src/support/rand.c')
| -rw-r--r-- | src/support/rand.c | 12 |
1 files changed, 0 insertions, 12 deletions
diff --git a/src/support/rand.c b/src/support/rand.c index 4fae43edc8e..a5b229b9abc 100644 --- a/src/support/rand.c +++ b/src/support/rand.c @@ -120,15 +120,3 @@ __wt_random(WT_RAND_STATE volatile * rnd_state) return ((z << 16) + (w & 65535)); } - -/* - * __wt_random64 -- - * Return a 64-bit pseudo-random number. - */ -uint64_t -__wt_random64(WT_RAND_STATE volatile * rnd_state) - WT_GCC_FUNC_ATTRIBUTE((visibility("default"))) -{ - return (((uint64_t)__wt_random(rnd_state) << 32) + - __wt_random(rnd_state)); -} |