tag v1.8.4 and v2.1.4 may be missing

[jingkaimori]

in commit f5f61a6, version is bumped to 2.1.4, but no new tag is pushed since 2.1.2

[daanx]

Yes, that is right -- still gearing up for a new release soon!
There is a somewhat big change in 1.8.4 and 2.1.4. On certain workloads with large services we saw the abandoned segments (segments that still have live data but whose owning thread has terminated) sometimes grow rather large. The new versions have a more aggressive reclamation strategy where also threads that free in an abandoned segment can reclaim it into their heap. This may affect large workloads so it is currently still being tested on services where we have seen this behavior and hoping the new strategy will improve things. To be continued.