Memory leak even if server is idle

Steps to reproduce:
1. Install single node Couchbase server 2.0.0 (http://builds.hq.northscale.net/latestbuilds/couchbase-server-enterprise_x86_64_2.0.0-1313-rel.deb).
2. Create default bucket (type: couchbase, ram quota 3 GB, no replica).
3. Enjoy growing memory consumption (no items, no views, no ops, no active connections).

Script to measure leak:
#!/bin/bash

1. First snapshot with memory stats
   /opt/couchbase/bin/cbstats localhost:11210 memory > snapshot1.log

1. Sleep 2 minutes
   sleep 120

1. Second snapshot
   /opt/couchbase/bin/cbstats localhost:11210 memory > snapshot2.log

1. Difference
   diff snapshot1.log snapshot2.log > diff.log

Sample diff.log:
< mem_used: 31510984
> mem_used: 32804232

It equals to 37 MB/hour (~900 MB/day).