[Rpm-maint] [rpm-software-management/rpm] Adding an LMDB backend to RPM (#281)

[Jeff Johnson]

One last comparison: RPM5 uses BerkeleyDB too, but with different tunables than RPM4.

Here's essentially the same measurement as the previous comment:
```
1.15user 0.87system 0:02.11elapsed 96%CPU (0avgtext+0avgdata 584900maxresident)k
240inputs+390776outputs (7major+355303minor)pagefaults 0swaps
```

I add this comment to squelch BerkeleyDB haters from taking my measurements and claiming

```"LMDB is Newer! Better! Faster! than BDB."```

I suspect the tunable that makes a huge difference is mmapsize (RPM5 sets this to 256Mb).

-- 
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub:
https://github.com/rpm-software-management/rpm/issues/281#issuecomment-318755057
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.rpm.org/pipermail/rpm-maint/attachments/20170728/41e94021/attachment-0001.html>