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1,438 discussions - 6,322 posts

  • *MemcacheDB* is a distributed key-value storage system designed for persistent. It is NOT a cache solution, but a persistent storage engine for fast and reliable key-value based object storage and ...
    Steve ChuSteve Chu
    Jul 2, 2008 at 7:18 am
    Jul 2, 2008 at 7:18 am
  • Another case is if memcached crashes or must be restarted (for example due to some critical bugfix). Sometimes it is very painful to restart one instance with few GBs of cached data, it is better to ...
    Janusz DziemidowiczJanusz Dziemidowicz
    Jul 1, 2008 at 8:43 pm
    Jul 1, 2008 at 8:43 pm
  • hey all. I'm pretty new to using memcached, but have already found it incredibly powerful. I don't run into any problems using it, but when my program exits, it dies with a seg-fault. If I comment ...
    Michael WieherMichael Wieher
    Jul 1, 2008 at 7:29 pm
    Jul 1, 2008 at 9:20 pm
  • Hi All, We have a MySQL server 5.0 / MyISAM. We use it to store a data base for a site written on PHP. We have problems with the performance of the MySQL server when we have many clients in the same ...
    Viktor PopovViktor Popov
    Jul 1, 2008 at 4:39 pm
    Jul 1, 2008 at 6:13 pm
  • I know this is a bit of a shot in the dark, but I thought I'd give it a go: We have perl reading/writing from/to our memcache server, and java just reading. Perl is working fine, but java only works ...
    Aidan SamuelAidan Samuel
    Jul 1, 2008 at 10:37 am
    Jul 1, 2008 at 1:27 pm
  • Yo, git-send-email is being a punk, so please check the three latest commits here: http://consoleninja.net/gitweb/gitweb.cgi?p=memcached.git;a=shortlog;h=stable (can also clone the repo: git clone ...
    Jun 29, 2008 at 11:58 pm
    Jun 29, 2008 at 11:59 pm
  • Yo, You might've noticed that lists.danga.com sucks sometimes. It might mailbomb you, it might not notify you of your own mail, or it might send you an error and post your message eight times. Also ...
    Jun 28, 2008 at 9:26 pm
    Jun 28, 2008 at 9:26 pm
  • Yo, If you're quick on the draw, you might notice that we've stopped using Subversion for development of the memcached branches. The download page has also been updated: ...
    Jun 28, 2008 at 9:19 pm
    Jun 28, 2008 at 11:30 pm
  • Hello, [Apologies if this is a double-post] I am in the process of creating an online user survey to solicit feature requests by memcached users and then have users vote on their priority. If you ...
    Jimmy GuerreroJimmy Guerrero
    Jun 27, 2008 at 4:38 pm
    Jun 27, 2008 at 4:46 pm
  • Hi all, So I've been working on implementing the stats command over binary protocol the last couple of days and came across few questions that I would like to ask. My approach is based on the ...
    Toru MaesakaToru Maesaka
    Jun 27, 2008 at 8:06 am
    Jun 29, 2008 at 6:39 am
  • An HTML attachment was scrubbed... URL: http://lists.danga.com/pipermail/memcached/attachments/20080627/3f34a2dc/attachment.html
    Vijay MehtaVijay Mehta
    Jun 27, 2008 at 7:55 am
    Jun 27, 2008 at 9:25 am
  • I'm getting "out of memory storing object" errors from memcached 1.2.5. It seems that I'm able to store larger values, but not smaller ones. Here's an example of that, as seen from the client side ...
    Scott RaymondScott Raymond
    Jun 27, 2008 at 4:39 am
    Jun 27, 2008 at 4:39 am
  • DanielDaniel
    Jun 26, 2008 at 4:25 pm
    Jun 26, 2008 at 5:50 pm
  • Hi, I am encountering an issue that is the same that the one mentioned here : http://lists.danga.com/pipermail/memcached/2007-February/003660.html Do you know in which release of the client the fix ...
    Le StefLe Stef
    Jun 25, 2008 at 11:44 am
    Jun 25, 2008 at 11:44 am
  • Is there anyone recording which platforms the server and various clients can be built on? It seems a bit hit and miss right now.
    Jun 25, 2008 at 8:18 am
    Jun 26, 2008 at 3:51 pm
  • Hi, As a newbie to memcached, I've been reading carefully the protocol document and have a question about the optional time value on the 'delete' command. The document describes very well how it ...
    Wayne HinemanWayne Hineman
    Jun 25, 2008 at 5:54 am
    Jun 26, 2008 at 3:48 pm
  • I don't know if he said this... just that if the memcached server is on a Windows box all windows clients connect correctly. No mention of if this windows server is local or on the LAN. If he's able ...
    Michael WieherMichael Wieher
    Jun 24, 2008 at 2:32 pm
    Jun 24, 2008 at 3:29 pm
  • I have spoken at conferences about our architecture and mentioned our caching proxy. I have wanted to open source it for a long time. I finally got the time. http://code.google.com/p/memproxy/ ...
    Brian MoonBrian Moon
    Jun 24, 2008 at 7:30 am
    Jun 24, 2008 at 7:30 am
  • Hey Folks, I?m partially through a .NET web app integration of memcached using the Enyim client bindings published on codeplex and had a few 101 questions about how the protocol behaves during a ...
    Jason McGuirkJason McGuirk
    Jun 23, 2008 at 10:56 pm
    Jun 24, 2008 at 8:17 am
  • Are you running memcached threaded? If not you should. If you are, you need more threads maybe? Yes, that is quite normal. -- Brian Moon Senior Developer/Engineer ------------------------------ When ...
    Brian MoonBrian Moon
    Jun 23, 2008 at 2:16 pm
    Jun 23, 2008 at 9:38 pm
  • Hi! What are you looking for? The C++ API in libmemcached is simple (and frankly too simple). I'd love to see someone extend/take an interest in it. Cheers, -Brian -- Brian "Krow" Aker, brian at ...
    Brian AkerBrian Aker
    Jun 20, 2008 at 9:25 pm
    Jun 20, 2008 at 9:43 pm
  • Hi, I wrote a quick little script[1] to aggregate stats on our cluster and managed to crash 4 of 11 servers after the first run and another server (same cluster) after another couple of runs. We're ...
    Chetan SarvaChetan Sarva
    Jun 19, 2008 at 10:29 pm
    Jun 19, 2008 at 10:29 pm
  • Hi, I see a lot of activity and work being done on the code base; bugs being fixed and new features added etc. There is a handful of small tests that come with memcached that is useful for sanity ...
    Victor KirkeboVictor Kirkebo
    Jun 19, 2008 at 10:20 am
    Jun 23, 2008 at 10:07 pm
  • For some approaches on how to avoid the "dog pile effect" on your database, take a look at: http://highscalability.com/strategy-break-memcache-dog-pile Ryan
    Ryan LeCompteRyan LeCompte
    Jun 19, 2008 at 2:02 am
    Jun 23, 2008 at 6:53 am
  • Hi, I'm trying to resolve memcached segfault that hit me recently. I'm using small instance of memcached (64MB) on Unix socket to collect some statistics (counters). It was working great, but ...
    Janusz DziemidowiczJanusz Dziemidowicz
    Jun 18, 2008 at 12:18 pm
    Jun 23, 2008 at 4:07 am
  • All, Per a suggestion from Brad, I wanted to follow up on my original posting with unified diffs for each of the two files modified. In addition, I compiled and tested memcached with these changes on ...
    Glenn BrunetteGlenn Brunette
    Jun 17, 2008 at 12:08 am
    Jun 17, 2008 at 1:27 pm
  • http://www.sun.com/corp_emp/search.cgi?loc=NO&req=NO0200137&u=&p= I knew Sun was pledging some resources but this shows how important/useful memcached truly is. They're going to pay someone a good ...
    Jun 16, 2008 at 6:21 pm
    Jun 17, 2008 at 4:06 am
  • If a key is very popular in the cache, when this key will expire, a lot of different clients will get an expired answer from the cache at the same time and they will gather the data from the source ...
    Olivier PoitreyOlivier Poitrey
    Jun 14, 2008 at 2:37 pm
    Jun 15, 2008 at 5:36 am
  • I've committed[0] a change for suffix freelist management for CAS that would reliably crash 1.2.5. The test I crashed it with looks like this (piped into netcat): #!/usr/bin/env python import sys for ...
    Dustin SallingsDustin Sallings
    Jun 13, 2008 at 4:46 pm
    Jun 16, 2008 at 12:08 am
  • Hi list, we're using memcache to cache documents in our application and we've got some issues with stability. Memcached segfaults after having been run for some time. We're using memcached version ...
    Hugo HallqvistHugo Hallqvist
    Jun 13, 2008 at 12:55 pm
    Jun 13, 2008 at 3:59 pm
  • Hi, I created my own win32 build for memcached 1.2.5 since there wasn't one available and I wanted the functionality. I've modified it more locally to do what I want, however I have put a basic ...
    Brodie ThiesfieldBrodie Thiesfield
    Jun 13, 2008 at 6:37 am
    Jun 14, 2008 at 5:57 am
  • We're running it on 64-bit windows (compiled as 64-bit). We're only starting to ramp up our usage of memcache, though, so it's not using all the memory it could be at this stage (approx. 1GB per ...
    Dean HardingDean Harding
    Jun 12, 2008 at 11:48 pm
    Jun 12, 2008 at 11:48 pm
  • Hi! It looks like just using a plain old memory table would be faster. The only reason I could think of to use memcached for this would be if the data set was so large that using a distributed table ...
    Brian AkerBrian Aker
    Jun 12, 2008 at 12:37 pm
    Jun 13, 2008 at 10:18 am
  • contention on memcached, over localhost? That's a little bizarre. Ignoring that you've corrected yourself already... :) Can you test over localhost:11211 instead of a unix domain socket, and see if ...
    Jun 12, 2008 at 7:31 am
    Jun 29, 2008 at 9:55 pm
  • Alan, somebody, Want to look into this? (I'm told it was sent to the list, but was eaten....) An HTML attachment was scrubbed... URL: ...
    Brad FitzpatrickBrad Fitzpatrick
    Jun 12, 2008 at 3:11 am
    Jun 12, 2008 at 7:14 am
  • Hi, I'm having some issues with the 'stats' command, using version 1.2.5. My stats says: [...] STAT bytes 1307912 [...] STAT limit_maxbytes 1048576 [...] The file "doc/protocol.txt" says: bytes 64u ...
    Mattias KarlssonMattias Karlsson
    Jun 11, 2008 at 2:16 pm
    Jun 23, 2008 at 9:13 pm
  • Hi Folks My understanding is that items will expire in two fundamental ways; if a TTL was specified on the set or if the cache needs room and deletes old items. My quesions are: Is this understanding ...
    Grant MaxwellGrant Maxwell
    Jun 11, 2008 at 2:04 am
    Jun 12, 2008 at 11:56 pm
  • Hi Grant, you can have a little data usage report sniffing the network: ngrep -W none -T -d any "^(get|set|delete|END|STORED|VALUE|DELETED)" port 11211 | awk '{print $1 " " $2}' or without the awk. ...
    Ludovic LevesqueLudovic Levesque
    Jun 10, 2008 at 3:46 pm
    Jun 10, 2008 at 5:03 pm
  • http://us2.php.net/manual/en/function.memcache-delete.php
    Joseph EngoJoseph Engo
    Jun 7, 2008 at 5:26 pm
    Jun 7, 2008 at 5:26 pm
  • Just curious where you get that information. -- Brian Moon Senior Developer/Engineer ------------------------------ When you care enough to spend the very least. http://dealnews.com/
    Brian MoonBrian Moon
    Jun 6, 2008 at 4:21 pm
    Jun 6, 2008 at 5:46 pm
  • Hi, memcached 1.2.5 is sometimes terminating on assert. Assert message: ?memcached-debug: items.c:222: item_unlink_q: Assertion `it- next != it' failed. memcached 1GB, 1 thread. 32bit Debian Etch, ...
    Jan CermakJan Cermak
    Jun 6, 2008 at 10:19 am
    Jun 9, 2008 at 8:24 am
  • Hi, I am using memcached-1.2.5 and there is after some time overfloating stats.curr_bytes. I added to item.c code some output (in int do_item_link(item *it), int do_item_unlink(item *it)) and print ...
    Jan CermakJan Cermak
    Jun 6, 2008 at 8:43 am
    Jun 6, 2008 at 8:43 am
  • The memcache protocol for increment says: The data for the item is treated as decimal representation of a 64-bit unsigned integer. If the current data value does not conform to such a representation, ...
    Brad FitzpatrickBrad Fitzpatrick
    Jun 5, 2008 at 7:37 pm
    Jun 5, 2008 at 11:14 pm
  • Hello, I've just got a quick question about the DELETE command. I know that DELETE is very efficient, because it just invalidates the given key without actually forcing the data out of memory. But, ...
    Jun 5, 2008 at 6:53 pm
    Jun 5, 2008 at 7:14 pm
  • The best answer is probably in the protocol documentation http://code.sixapart.com/svn/memcached/trunk/server/doc/protocol.txt rusage_user 32u:32u Accumulated user time for this process ...
    Jehiah CzebotarJehiah Czebotar
    Jun 4, 2008 at 5:14 pm
    Jun 4, 2008 at 5:14 pm
  • Hi, I had need for a C++ memcached client for Windows. I found that the existing C++ clients were not particularly easy to use with Windows and so created a simple client of my own. Released under ...
    Brodie ThiesfieldBrodie Thiesfield
    Jun 3, 2008 at 6:47 am
    Jun 3, 2008 at 6:47 am
  • Hi! UDP and TCP are always enabled now. You don't have to do one or the other (and they both run on the same port, so you don't have to do some discovery from the client side). Cheers, -Brian -- ...
    Brian AkerBrian Aker
    Jun 2, 2008 at 12:00 pm
    Jun 2, 2008 at 12:55 pm
  • Hello Weired problem here on a prduction system. After filling the cache with data the application tries to get an entry and the server crashes when using sendmsg - strace looks like this: ...
    Juergen MathwichJuergen Mathwich
    Jun 2, 2008 at 8:56 am
    Jun 2, 2008 at 8:56 am
  • Summary: For 90% of all cases: "clock_gettime(CLOCK_MONOTONIC, ...)" == good. "gettimeofday(2)" == bad. I haven't benched 1.2.5, but I'd bet a beer that the culprit is the following 1.2.5 change: * ...
    Sean ChittendenSean Chittenden
    Jun 1, 2008 at 10:45 pm
    Jun 2, 2008 at 4:34 am
  • First I've heard of this :( Any chance you could do a git bisect on the tree to narrow down the performance drop? git clone http://consoleninja.net/code/memcached/memcached.git - stable tree (sorry, ...
    May 31, 2008 at 12:35 am
    May 31, 2008 at 12:35 am
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