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Memcached 1.4.21 Release Notes
- makefile cleanups
- Avoid OOM errors when locked items stuck in tail
If clients occasionally fetch many items, more than can fit the TCP buffers, then hang for a very long period of time, that slab class could OOM. In older versions this could cause a crash. Since 1.4.20 this will cause OOM errors.
Now, if a locked item lands in the LRU tail, it will be bumped back to the head and an lrutail_reflocked counter incremented. If you're concerned about having stuck clients, watch that counter.
Big thanks to Jay Grizzard et all at Box for helping track this down!
The following people contributed to this release since 1.4.20.
Note that this is based on who contributed changes, not how they were done. In many cases, a code snippet on the mailing list or a bug report ended up as a commit with your name on it.
Note that this is just a summary of how many changes each person made
which doesn't necessarily reflect how significant each change was.
For details on what led up into a branch, either grab the git repo and
look at the output of
git log 1.4.20..1.4.21 or use a web view.
- Repo list: https://github.com/memcached/memcached/wiki/DevelopmentRepos
- Web View: http://github.com/memcached/memcached/commits/1.4.21
4 Steve Wills 3 dormando 1 Jay Grizzard