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2007-08-21 Paul Lindner <>
* Incorporate incrememnt patch from Evan Miller
<> to define increment overflow
2007-08-07 Leon Brocard <>
* Bring the memcached.1 manpage up to date
2007-08-06 Paul Lindner <>
* Fix crash when using -P and -d flags on x86_64
with latest libevent release.
2007-07-08 Steven Grimm <>
* Item stats commands weren't thread-safe; wrap them with locks
when compiled in multithreaded mode.
* The "stats items" command now works again; it broke with the
introduction of the powers-of-N chunk size change.
2007-07-06 [Version 1.2.3 released]
2007-06-19 Paul Lindner <>
* Solaris portability fixes from Trond Norbye
2007-05-29 Paul Lindner <>
* Properly document evictions statistic value
2007-05-10 Paul Lindner <>
* Flesh out tests for unix domain sockets and binary data.
* Update rpm spec file to run tests
2007-05-07 Paul Lindner <>
* Fix compilation bug on freebsd 6.x (and maybe others)
* Update RPM spec file per redhat bugzilla #238994
* Move unistd.h to memcached.h to get rid of warnings
* Add string.h to thread.c to get correctly prototyped strerror()
2007-05-04 Paul Lindner <>
* Add fedora/redhat style init script and RPM spec file
2007-05-12 [Version 1.2.2 released]
2007-04-16 Steven Grimm <>
* Command tokenizer performance and cleanliness improvement.
Patch contributed by Paolo Borelli <>.
2007-04-16 Paul Lindner <>
* Add notes to README about MacOS, libevent and kqueue.
* Windows Patch integration -- part 1, warnings elimination.
2007-04-12 Paul Lindner <>
* Allow changes to the verbosity level of the server with a new
"verbosity" command and some compiler cleanups.
Patch contributed by Paolo Borelli <>.
2007-04-08 Paul Lindner <>
* Add cleanup patch from "Tim Yardley" <> to
clean up source spacing issues, fix -Wall warnings, add some
null checks, adds asserts at the top of each function for any
use of conn *c without checking to see if c is NULL first.
* Also adjust to clean *.ac files. Add
script to test-suite to test for tabs.
2007-04-04 Paul Lindner <>
* Add clarification of flush_all in the protocol docs
from Elizabeth Mattijsen <>
2007-03-31 Paul Lindner <>
* Add patch from Eli Bingham <> to
re-enable the -n switch to memcached.
2007-03-20 Paul Lindner <>
* Add patch to collect eviction statistics from
Jean-Francois BUSTARRET <>.
* Updated docs, added new test cases for t/stats.t
2007-03-18 Paul Lindner <>
* Add more test cases using larger buffer sizes up to and greater
than 1MB.
* Remove unused parameter to item_size_ok()
* Use a single printf() in usage()
* Add a failing test for conforming with maximum connections.
* crash fix from Thomas van Gulick <> in
conn_shrink(), passing &ptr, instead of ptr to realloc().
2007-03-05 Paul Lindner <>
* Fix a number of places where (s)printf calls were using unsigned
or signed formats that did not match their arguments.
* Add support for stdbool.h and stdint.h to use the bool and
uint8_t types.
* Major refactoring - move API calls for assoc/items/slabs to
their own individual header files. Add apropriate const and
static declarations as appropriate.
* Avoid type-punning. Do a more efficient realloc inside the
conn_shrink routine.
* Fix overflow bug where uninitialized access to slabclass caused
size-0 mallocs during slab preallocation.
* Convert some sprintf calls to snprintf to protect against
buffer overflows.
* Explicitly compare against NULL or zero in many places.
* Steven Grimm <>: Per-object-type stats collection
support. Specify the object type delimiter with the -D command line
option. Turn stats gathering on and off with "stats detail on" and
"stats detail off". Dump the per-object-type details with
"stats detail dump".
* Steven Grimm <>: Fix an off-by-one error in the
multithreaded version's message passing code.
* fix expirations of items set with absolute expiration times in
the past, before the server's start time. bug was introduced in
1.2.0 with rel_time_t. Thanks to Adam Dixon
<> for the bug report and test case!
* Steven Grimm <>: Performance improvements:
Dynamic sizing of hashtable to reduce collisions on very large
caches and conserve memory on small caches.
Only reposition items in the LRU queue once a minute, to reduce
overhead of accessing extremely frequently-used items.
Stop listening for new connections until an existing one closes
if we run out of available file descriptors.
Command parser refactoring: Add a single-pass tokenizer to cut
down on string scanning. Split the command processing into
separate functions for easier profiling and better readability.
Pass key lengths along with the keys in all API functions that
need keys, to avoid needing to call strlen() repeatedly.
* Steve Peters <>: OpenBSD has a malloc.h,
but warns to use stdlib.h instead
* Steven Grimm <>: Add support for multithreaded
execution. Run configure with "--enable-threads" to enable. See
doc/threads.txt for details.
* Iain Wade <>: Fix for UDP responses on non-"get"
* Steven Grimm <>: Add a new administrative command,
"flush_regex", which expires all keys matching a regular expression.
THIS COMMAND SHOULD BE USED SPARINGLY -- it will lock up the server
while it runs. It is intended for debugging and disaster recovery,
not for normal day-to-day use.
* Steven Grimm <>: Dynamic sizing of hashtable to
reduce collisions on very large caches and conserve memory on
small caches.
* Steven Grimm <>: New faster hash function.
* don't listen on UDP by default; more clear message when UDP port in use
* release 1.2.0 (along with 1.1.13, which is the more tested branch)
nobody has run 1.2.0 in production, to my knowledge. facebook has run
their pre-merge-with-trunk version, but bugs were discovered (and fixed)
after the merge. there might be more. you've been warned. :)
* improved autoconf libevent detection, from the Tor project.
* test suite and lot of expiration, delete, flush_all, etc corner
case bugs fixed (Brad Fitzpatrick)
* Nathan Neulinger <>: fix breakage in expiration code
causing expiration times to not be processed correctly.
* Nathan Neulinger <>: fix incompatabilities with
unix domain socket support and the UDP code and clean up stale
* Nathan Neulinger <>: unix domain socket support
* Steven Grimm <>: big bunch of changes:
big CPU reduction work, UDP-based interface, increased memory
efficiency. (intertwined patch, committed all together)
or see svn commit logs
* River Tarnell: autoconf work for Solaris 10. Brad:
merge and verify it works on Nexenta.
* avva: bucket/generation patch (old, but Brad's just finally
committing it)
* Brad Fitzpatrick <>: allocate 1 slab per class
on start-up, to avoid confusing users with out-of-memory errors
later. this is 18 MB of allocation on start, unless max memory
allowed with -m is lower, in which case only the smaller slab
classes are allocated.
* Elizabeth Mattijsen <>: needed a way to flush all
memcached backend servers, but not at exactly the same time (to
reduce load peaks), I've added some simple functionality to the
memcached protocol in the "flush_all" command that allows you to
specify a time at which the flush will actually occur (instead of
always at the moment the "flush_all" command is received).
* patch from Peter van Dijk <> to make
stderr unbuffered, for running under daemontools
* patch from Don MacAskill <> 'flush_all' doesn't
seem to work properly. Basically, if you try to add a key which
is present, but expired, the store fails but the old key is no
longer expired.
* release 1.1.12
* Date: Thu, 18 Nov 2004 15:25:59 -0600
From: David Phillips <>
Here is a patch to and to put the man page in
the correct location. Trying to install the man page from a
subdirectory results in the subdirectory being used in the install
path (it tries to install to doc/memcached.1). This is the correct
thing to do:
- create a in the doc directory that installs the man page
with man_MANS
- modify in the base directory to reference the doc
directory using SUBDIRS
- modify the AC_CONFIG_FILES macro in to output the
Makefile in doc
* pidfile saving support from Lisa Seelye <>, sent
Jan 13, 2005
* don't delete libevent events that haven't been added (the deltimer)
patch from Ted Schundler <>
* document -M and -r in manpage (Doug Porter <>)
* fix buffer overflow in items.c with 250 byte keys along with
other info on the same line going into a 256 byte char[].
thanks to Andrei Nigmatulin <>
* immediate deletes weren't being unlinked a few seconds,
preventing "add" commands to the same key in that time period.
thanks to Michael Alan Dorman <> for the
bug report and demo script.
* released 1.1.11
* Avva: Add a new command line option: -r , to maximize core file
* Avva: Use getrlimit and setrlimit to set limits for number of
simultaneously open file descriptors. Get the current limits and
try to raise them if they're not enough for the specified (or the
default) setting of max connections.
* Adds a '-M' flag to turn off tossing items from the cache.
(Jason Titus <>)
2004-02-19 (Evan)
* Install manpage on "make install", etc.
2003-12-30 (Brad)
* remove static build stuff. interferes with PAM setuid stuff
and was only included as a possible fix with the old memory
allocator. really shouldn't make a difference.
* add Jay Bonci's Debian scripts and manpage
* release version 1.1.10
2003-12-01 (Avva)
* New command: flush_all, causes all existing items to
be invalidated immediately (without deleting them from
memory, merely causing memcached to no longer return them).
* Shift init code around to fix daemon mode on FreeBSD,
* and drop root only after creating the server socket (to
* allow the use of privileged ports)
* version 1.1.10pre
* BSD compile fixes from Ryan T. Dean
* version 1.1.9
* ignore SIGPIPE at start instead of crashing in rare cases it
comes up. no other code had to be modified, since everything
else is already dead-connection-aware. (avva)
2003-09-09 (Avva, Lisa Marie Seelye <>)
* setuid support
2003-09-05 (Avva)
* accept all new connections in the same event (so we work with ET epoll)
* mark all items as clsid=0 after slab page reassignment to please future
asserts (on the road to making slab page reassignment work fully)
2003-08-12 (Brad Fitzpatrick)
* use TCP_CORK on Linux or TCP_PUSH on BSD
* only use TCP_NODELAY when we don't have alternatives
* disable Nagel's Algorithm (TCP_NODELAY) for better performance (avva)
* support multiple levels of verbosity (-vv)
2003-08-10 (Evan Martin)
* debug, optimization, and static flags are controlled
by the configure script.
- allow specifying libevent directory with --with-libevent=DIR
- check for malloc.h (unavailable on BSDs)
- check for socklen_t (unavailable on OSX)
* assoc.c, items.c, slabs.c: Remove some unused headers.
* memcached.c: allow for nonexistence of malloc.h; #define a POSIX
macro to import mlockall flags.
* version 1.1.7
* big bug fix: item exptime 0 meant expire immediately, not never
* version 1.1.8
* make 'delete' take second arg, of time to refuse new add/replace
* set/add/replace/delete can all take abs or delta time (delta can't
be larger than a month)
* added doc/protocol.txt
* report CPU usage in stats
* version 1.1.6
* fix a number of obscure bugs
* more stats reporting
* removing use of Judy; use a hash. (judy caused memory fragmentation)
* shrink some structures
* security improvements
* version 1.1.0
* changing maxsize back to an unsigned int
* adding PHP support
* added CONTRIBUTORS file
* version 1.0.4
* forgot to distribute website/api (still learning auto*)
* version 1.0.3
* update to version 1.0.2
* autoconf/automake fixes for older versions
* make stats report version number
* change license from GPL to BSD
Fri, 13 Jun 2003 10:05:51 -0700 Evan Martin <>
*,, Use autotools.
* items.c, memcached.c: #include <time.h> for time(),
printf time_t as %lu (is this correct?),
minor warnings fixes.