davisp commented on a change in pull request #1842: Implement partition size
limits
URL: https://github.com/apache/couchdb/pull/1842#discussion_r248024661
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File path: src/couch/src/couch_db_updater.erl
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@@ -656,6 +724,40 @@ increment_local_doc_revs(#doc{revs = {0, [RevStr | _]}} =
Doc) ->
increment_local_doc_revs(#doc{}) ->
{error, <<"Invalid rev format">>}.
+max_partition_size() ->
+ config:get_integer("couchdb", "max_partition_size",
+ ?DEFAULT_MAX_PARTITION_SIZE).
+
+partition_size(Db, Partition) ->
+ {ok, Info} = couch_db:get_partition_info(Db, Partition),
+ Sizes = couch_util:get_value(sizes, Info),
+ couch_util:get_value(external, Sizes).
+
+estimate_size(#full_doc_info{} = FDI) ->
+ #full_doc_info{rev_tree = RevTree} = FDI,
+ Fun = fun
+ (_Rev, Value, leaf, SizesAcc) ->
+ case Value of
+ #doc{} = Doc ->
+ ExternalSize = get_meta_body_size(Value#doc.meta),
+ {size_info, AttSizeInfo} =
+ lists:keyfind(size_info, 1, Doc#doc.meta),
+ Leaf = #leaf{
+ sizes = #size_info{
+ external = ExternalSize
+ },
+ atts = AttSizeInfo
+ },
+ add_sizes(leaf, Leaf, SizesAcc);
+ #leaf{} ->
+ add_sizes(leaf, Value, SizesAcc)
+ end;
+ (_Rev, _Value, branch, SizesAcc) ->
+ SizesAcc
+ end,
+ {_, FinalES, FinalAtts} = couch_key_tree:fold(Fun, {0, 0, []}, RevTree),
Review comment:
Well it'll be `O($num_revs_in_tree)` so its linear in that respect. However
I added the obvious optimization to only call estimate_size when we find a
document in a partition that is overflowed so we'll only be calling it when
absolutely necessary.
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