[couchdb] branch prototype/fdb-layer updated: Fix division by zero

[da...@apache.org]

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davisp pushed a commit to branch prototype/fdb-layer
in repository https://gitbox.apache.org/repos/asf/couchdb.git


The following commit(s) were added to refs/heads/prototype/fdb-layer by this push:
     new daf1082  Fix division by zero
daf1082 is described below

commit daf10824af695669dde61828414e8aff9e2de9d9
Author: Paul J. Davis <pa...@gmail.com>
AuthorDate: Thu Apr 9 10:42:18 2020 -0500

    Fix division by zero
---
 src/couch_rate/src/couch_rate_limiter.erl | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/couch_rate/src/couch_rate_limiter.erl b/src/couch_rate/src/couch_rate_limiter.erl
index 349da8d..6f852b1 100644
--- a/src/couch_rate/src/couch_rate_limiter.erl
+++ b/src/couch_rate/src/couch_rate_limiter.erl
@@ -135,6 +135,8 @@ budget(Id, #?STATE{} = State) ->
         overloaded ->
             %% decrease budget
             {max(1, round(R * MultiplicativeFactor)), State};
+        underloaded when W == 0 orelse Latency == 0 ->
+            {max(1, round(MR)), State};
         underloaded ->
             ReadWriteRatio = min(1, MR / max(1, MW)),
             SingleWrite = Latency / W,