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* tests: skip whitespace on vendor/*dormando2022-07-031-1/+1
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* Add a command to dump keys for memcached-toolJunji Hashimoto2022-07-031-0/+26
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* Improve page balancing when writes are burstyMark Hagger2020-07-021-6/+18
| | | | | | Extention to the existing slab reallocation model to better cope with eviction patterns that appear in short timeframe bursts. This means that if more than 25% of the total evictions in the window appear in this slab it becomes a candidate for needing more pages.
* Fix up tabular output for the 'stats' command.Josh Kupershmidt2020-01-131-2/+2
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* change some links from http to httpskun2019-05-201-1/+1
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* memcached-tool dump fix loss of exp valueJohn Leslie2019-04-261-3/+3
| | | | | regex call unescaping key reassigns $2 -- store/reference it as $exp
* Include keys with non-[\w.~-] bytes in memcached-tool dumpCharmander2018-06-271-2/+5
| | | | `lru_crawler metadump` uses `uriencode`.
* Remove unused variable: pool_highPeter (Stig) Edwards2018-06-271-1/+0
| | | pool_high was added in https://github.com/memcached/memcached/commit/e4caa1917b17f599603c29d4af58a68e73a1f428 , and the use of it was removed in https://github.com/memcached/memcached/commit/aa552fed9d9cffd10197bb3b2a62ad82ece62d5b#diff-b43c9d46afe4cc3ee89f2f819428a082 . As reported on https://lgtm.com/projects/g/memcached/memcached/alerts/?mode=list
* memcached-tool: Add 'limit' parameter to 'dump'.Calin Iorgulescu2018-03-232-24/+52
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* Rewrite memchached-tool 'dump' method to use new lru_crawler interface.Calin Iorgulescu2018-03-231-36/+22
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* Spelling fixesJosh Soref2018-03-142-2/+2
| | | | | | | | | | * automover * avoiding * compress * fails * successfully * success * tidiness
* systemd instancing support & rpm build improvementsJ. Grizzard2018-02-193-34/+145
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The major things this does are adding systemd support to the rpm .spec file, and adding systemd instancing support. This means that it is possible to run multiple memcached instances without having to do any additional configuration or hack on init scripts. To use: systemctl start memcached@11211 memcached@11311 memcached@11411 sysconfig files at /etc/sysconfig/memcached.<port> will be read as appropriate, to allow differing configurations per-port. Defaults will be read from /etc/sysconfig/memcached before the port-specific settings are read. You can also still start memcached the standard way just by doing "systemctl start memcached". This will read /etc/sysconfig/memcached and nothing else. The "enhanced security" lines in the systemd unit file will be commented out on systems where we know systemd isn't knew enough (fedora < 26 and Redhat/CentOS 7), and enabled on other systems. There are two versions of the .service file included, one for standard memcached invocations and one for instanced invocations. The two are very similar, but not identical. Ideally, we'd only have one version in the source tree and we'd massage it with sed or somesuch during the rpm build, but couldn't think of a super clean way to do that, so erred on the side of simplicity. A decent amount of spec file work was needed to enable this functionality. In the process, I also cleaned up several additional aspects of the spec file (like using %{name} in places where it was appropriate). I also commented out the automatic restart in the %postun section, for two main reasons: 1. The try-restart for instanced memcached will produce an error if instanced memcached isn't in use, which is probably quite confusing to people who aren't using that functionality and are just trying to update their package. (There's workarounds for this, but I try to keep pre/post scripts as simple as humanly possible) 2. Automatic restarts on updates means the cache gets flushed, which means you can no longer safely use large-scale management tools (like puppet or chef) to roll out new versions, at least not without a lot of planning first. Not automatically dumping someone's caches feels safer, here.
* add evictions-happened test back to am scriptdormando2018-02-121-9/+10
| | | | | | | not as easy to do the "global pool filled once" check, since the underlying memcached can be restarted but the script will just reconnect. simplest thing to do is to keep the evictions check, which stops the algorithm on a sudden reset.
* extstore: revise automove algorithmdormando2018-02-081-32/+26
| | | | | | | allows reassigning memory from global page pool to a specific class. this allows simplifying the algorithm to rely on moving memory to/from global, removing hacks around relaxing free memory requirements.
* extstore: more page mover algorithm fixesdormando2017-12-181-10/+21
| | | | | | | | | | wasn't checking for "dirty" flag on a class before deciding it was too free, so it would assign/remove/assign/remove/assign/remove, and tend to over-remove slightly. Over time the global page pool would simply grow. Also adjusts timing so draining the global page pool works better. multiple classes can be drained into at once by nature of zeroing out the free limits one at a time.
* extstore: another page balancer tweakdormando2017-12-141-8/+26
| | | | | | | | | | | wasn't aggressively enough reclaiming excess free memory if it was wobbling around a specific number. should drop it with some stop and go but will fix and should have a window sized delay to absorb wobbles in free memory due to crawlers freeing things. might be able to further tweak by preventing the reclaim if it's *consistently* dropping for the whole window. a task for the future :P
* extstore: fix min free chunks in automove scriptdormando2017-12-061-0/+3
| | | | | need to hold at least 1.5 pages free so balancing won't early evict in most situations.
* extstore: automove script try #2.dormando2017-12-041-51/+69
| | | | | | | | using the new per-class free chunk limiter and ignoring item age, we can now create a highly responsive page mover algorithm. It makes much fewer page moves than before and keeps more of the free memory target in each class. adjusts the per-class limits once per minute, and otherwise balancers by age.
* extstore: fix in external automove scriptdormando2017-11-281-1/+1
| | | | python types still escape me.
* extstore: always output global page pooldormando2017-11-281-2/+1
| | | | | | | if we want to disable automove and run an external algo that examines the page pool count... removes temp hack from external script.
* extstore: automove algorithm test scriptdormando2017-11-281-0/+279
| | | | | | | | | | | | | | first pass at an extstore-friendly automove algorithm. With a static item_age value, extra RAM may be unused during all or parts of the day, and the existing balancer may not give enough memory to small slab classes. This does a lot of page moving and can be further improved. - leave some of the "buffer" as actual free space in each slab class. only move pages back to global if one gets way too much memory. - use a PID controller to slew adjustments. but it does work, so I'll probably convert this to C and revise the algo later.
* memcached-tool: fix slab full? columndormando2017-08-241-1/+1
| | | | | free_chunks_end stopped working years ago when the page mover was being optimzed. check now looks for used_chunks == total_chunks.
* add a real slab automover algorithmdormando2017-06-231-1/+1
| | | | converts the python script to C, more or less.
* automove script: improve algo, add basic testdormando2017-06-231-18/+39
| | | | | | | | | | | | added a devtools/slab_loadgen script for some basic testing of load patterns. can easily add more features (typical variance/reads/inline reload/etc) to further tune algo but was helpful enough as-is. Was able to restart the program with changed configs and watch rebalancer fix itself. rebalancer algo is now much better at pulling slab classes closer together and not ping-ponging, which previous version was doing even with a steady state of sets.
* remove old slab mover example script.dormando2017-06-041-260/+0
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* memcached-automove script fixdormando2017-06-041-1/+1
| | | | reported by hobbs. my python is so bad :(
* automover algo python scriptdormando2017-05-281-0/+208
| | | | external algorithm testing thing.
* whitespace fix.dormando2017-02-261-1/+1
| | | | whoops, forgot to run the test when cherry-picking :/
* +status check routineJuliy V. Chirkov2017-02-261-2/+13
| | | | | | | | | | | | | | | | | one can check status of sole memcached daemon if there’re no instances configured (this is default behaviour on request made in common way w/o xtra args) or check status of some instance from bunch an outcome is short diagnostic message along w/ appropriate ret code — status of sole memcached daemon /etc/init.d/memcached status /sbin/service memcached status — status of memcached instance ’instance001’ /etc/init.d/memcached status instance001 /sbin/service memcached status instance001 — status of memcached instance ’instance014’ /etc/init.d/memcached status instance014 /sbin/service memcached status instance014
* Further increase systemd service hardeningCraig Andrews2016-12-191-0/+28
| | | Disable use of namespaces, control groups, addresses families that aren't used, kernel module loading, and setting of kernel tunables.
* widen systemd caps to allow maxconns to increasedormando2016-12-181-1/+1
| | | | | | the parent process is the only one using that capability, once privileges are dropped it's gone anyway. This prevents raising the connection limit from breaking.
* Add MemoryDenyWriteExecute to the systemd serviceCraig Andrews2016-08-111-0/+4
| | | MemoryDenyWriteExecute=true will prevent attempts to create memory mappings that are both writable and executable at the same time. This option improves service security, as it makes harder for software exploits to change running code dynamically.
* Handle end of line comment on memcached.confGuillaume Delacour2016-08-111-1/+1
| | | | From http://code.google.com/p/memcached/issues/detail?id=283
* Modernize unit fileRemi Collet2016-08-111-6/+8
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* Comment the systemd service1.4.28Craig Andrews2016-07-011-0/+20
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* systemd hardeningCraig Andrews2016-07-011-0/+8
| | | memcached should be isolated and restricted as much as possible to improve security so that if memcached is compromised, the damage will be limited.
* Fix typo of pid pathhiracy2016-05-291-1/+1
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* add man page for memcached-toolMiroslav Lichvar2015-11-181-0/+71
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* Add instance job for memcachedCameron Norman2015-11-181-0/+26
| | | | This is (these are) automatically started and stopped by the main job.
* Added main memcached job.Cameron Norman2015-11-181-0/+25
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* Use unlink instead of `rm -f` in start-memcached scriptCameron Norman2015-11-181-1/+1
| | | | This is necessary for an Upstart job, because the call out to rm -f causes Perl to fork off a process, and Upstart think that new process is the main one (not the exec'd memcached process later on).
* Implement settings and sizes stats. Show information about empty slabs.Andrey Niakhaichyk2013-12-191-1/+55
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* no same-class reassignment, better errorsdormando2012-01-031-1/+1
| | | | | Add human parseable strings to the errors for slabs ressign. Also prevent reassigning memory to the same source and destination.
* initial slab automoverdormando2012-01-031-0/+260
| | | | | | | | | | Enable at startup with -o slab_reassign,slab_automove Enable or disable at runtime with "slabs automove 1\r\n" Has many weaknesses. Only pulls from slabs which have had zero recent evictions. Is slow, not tunable, etc. Use the scripts/mc_slab_mover example to write your own external automover if this doesn't satisfy.
* Add a systemd service file1.4.9Miklos Vajna2011-10-171-0/+10
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* start-memcached writing wrong PID to $pidfile1.4.8Nate2011-10-041-9/+8
| | | | | after the doublefork was added, the pidfile was now of the intermediary pid, not the one forked after setsid.
* fix memcached-tool to print about all slabsdormando2011-08-101-1/+3
| | | | previously hardcoded to 40. now will iterate up through all of them.
* Properly daemonize memcached for debianClint Byrum2011-08-101-0/+8
| | | | | The debianish start script routes the STDERR/STDOUT to make "logfiles", but in doing so doesn't break free of the launching session. Patch fixes that.
* Allow memcached-init to start multiple instancesGordon Franke2011-08-102-18/+64
| | | | | | | | Patch by Gordon Franke. Whitespace fixes and comments added by Dormando. There are many better ways to do this, but it doesn't break the default and the "status" command never existed. Servers can be started and stopped individually, and people seem to like the idea.
* Allow use of a UNIX socket in addition to INET socketsJon Jensen2010-04-201-8/+19
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