Which Sphinx version are you? Let us help you pick.
2.2.7-release (January 2015)
Generally recommended release.
Sphinx 2.2.x series has been in the making for a while, rather extensively tested in production, and the development focus has already shifted to 3.0 for a few months now. So even though most betas are quite stable and safe for production use anyway, a new official non-beta release is well due and we’re pretty excited about it. Meet Sphinx 2.2.7-release!
Compared to 2.1.x series, it packs about an extra calendar year of development work and around 70 new features (all scrupulously listed in the changelog). The biggest highlights for those of you who are still on 2.1 rather than any of the 2.2 betas are as follows:
And for those who have been following our betas, the more noticeable new niceties added in 2.2.7 since 2.2.3 are:
2.3.1-beta (March 2015)
Now with complete JSON support, GROUP <N> BY extensions, HAVING clause, online ALTER, ATTACH into existing RT indexes, even more ranking signals, English and German moprhology, RLP Chinese segmenter support, and more!
Please note that some features might not be production stable.
If you managed to hit a bug in Sphinx Beta release please submit all the details to our Bug Tracker.
What is a Sphinx Beta? It's a release in which, to the best of our knowledge,
Core indexing and searching functionality does, of course, fall into the "existing features" category and should be rock solid at all times.
We're constantly fixing old things and adding new things, and open source means you can check what's on the bleeding edge at any time. Or dig into the project history. We keep a public read-only SVN repository mirror at Google Code for that.
Both beta and release versions from The Times Past.