seems to be old-ish and have hard-coded values preventing it to cache large amount of data.  $ buffer -m 1G max_shmem 1 too low    // it doesn't even understand gigabytes $ buffer -m 1000M Cannot handle that many blocks, aborting! $ buffer -m 1000M -s 1m blocksize 1048576 out of range   What do use instead?
123444
Is there a utility that I can stick in a pipeline to decouple read and write speeds?  $ producer | buf | consumer   Basically, I want a utility buf that reads its input as fast as possible, storing it in memory so consumer can take its sweet time while producer runs as fast as possible.
85849
The drive is constantly filling up. You've hunted down all the spare and random files you can. grep'd for coredump files and even removed some of the un-needed backups...  What would be your next move.  The actual server in question has 10GB of website files and the OS shouldn't take any more than 10GB so how do you track down what's filling a 50GB (virtual) drive?
37116
Within the output of top, there are two fields, marked "buff/cache" and "avail Mem" in the memory and swap usage lines:    What do these two fields mean?  I've tried Googling them, but the results only bring up generic articles on top, and they don't explain what these fields signify.
76425
As a comment in  user  wrote:     Another reason to avoid | true is that if the command produced enough output to fill up the pipe buffer, it would block waiting for true to read it.   Do we have some way of finding out what the size of the pipe buffer is?
79358
I am running centos 5.8 with cpanel. Lately I am getting reports that my swap is full , but there is a lot of free memory  to use.  top - 10:33:43 up 133 days, 17:00,  1 user,  load average: 0.05, 0.03, 0.05   Tasks: 170 total,   1 running, 169 sleeping,   0 stopped,   0 zombie   Cpu(s):  2.1%us,  0.5%sy,  0.0%ni, 97.2%id,  0.0%wa,  0.0%hi,  0.2%si,  0.0%st   Mem:  24726100k total,  8255368k used, 16470732k free,   599560k buffers   Swap:  1046520k total,   984740k used,    61780k free,  3641828k cached     How do I solve this? The unused ram memory should be used instead of the swap. Or should I increase the swap ( and how do I do that ? ).  Thanks
57692
For example, my  says this:   Supports DDR3 2133(OC)/1866(OC)/1600/1333/1066 non-ECC, un-buffered memory   Is RAM clocked at 2400 MHz compatible? Will the performance be downgraded or it just won't work?  I found other questions but they were related to the CPU cap at 1600 MHz. This cap is related to the motherboard, specs says 2133(OC) max.
79900
I've tried to deal with this for days now with no luck. In this forum and also in other ones I can see a lot of discussion about this but none of the solutions have worked for me.  My current situation is that I've got some GBs "missing" that I can't free or find anywhere. I guess this is some kind of problem like memory leaks that only get fixed when rebooting, but I just would like to ask if someone has a better idea because there are currently a few customers on that server.  Here are some of the commands I've seen in other threads and my particular outputs:  df -h  Filesystem            Size  Used Avail Use% Mounted on /dev/sda1              19G   16G  1.8G  90% / tmpfs                 384M     0  384M   0% /lib/init/rw udev                   10M  1.2M  8.9M  12% /dev tmpfs                 384M     0  384M   0% /dev/shm   du -Pshx /* 2>/dev/null  4.8M    /bin 27M /boot 0   /cdrom 1.2M    /dev 8.8M    /emul 504M    /etc 4.0K    /grubconf 88K /home 60K /images 0   /initrd.img 147M    /lib 0   /lib32 0   /lib64 16K /lost+found 12K /media 4.0K    /mnt 4.4M    /opt 777M    /proc 57M /root 4.7M    /sbin 4.0K    /selinux 4.0K    /srv 0   /sys 4.0K    /tmp 332M    /usr 471M    /var 0   /vmlinuz   lsof +L1  (no output)   lsof | grep -i delete  (no output)   find / -size +50000 -exec ls -lah {} +;  -r-------- 1 root    root 777M 2015-07-21 06:19 /proc/kcore -rw------- 1 root    root  64M 2015-07-09 03:31 /sys/devices/pci0000:00/0000:00:06.0/0000:01:04.0/resource0 -rw-r----- 1 root    adm   49M 2015-07-21 06:19 /var/log/auth.log -rw-r----- 1 root    adm  174M 2015-07-19 06:25 /var/log/auth.log.1 -rw-rw---- 1 control mail 100M 2015-07-21 06:00 /var/mail/control   If you make the maths from du, for example, you get a few GBs, but nothing close to 16GB.  / is ext3.  OS is Debian 6.0  is there anything am I missing here?
29672
My server has slowed down, and I don't know why.  Print from top:  top - 14:32:50 up 639 days,  6:30,  1 user,  load average: 67.93, 70.63, 79.85 Tasks: 245 total,   1 running, 244 sleeping,   0 stopped,   0 zombie Cpu(s):  3.9% us,  0.5% sy,  0.0% ni, 94.5% id,  1.0% wa,  0.0% hi,  0.0% si Mem:   1034784k total,  1021256k used,    13528k free,     4360k buffers Swap:  1023960k total,   635752k used,   388208k free,    36632k cached   vmstat 10 6  procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu----  r  b   swpd   free   buff  cache   si   so    bi    bo   in    cs us sy id wa  0 110 795604  12328   3980  46676    0    0     0     0    0     0  4  1 95  1  0 97 788848  12052   3960  46256 2985   33  3323    33  429     0  2  1  0 97  0 119 782660  13992   4096  45740 2780   14  2995   360  435     0  2  1  1 96  0 121 775924  15600   3724  42796 3084    0  3443   136  440     0  2  1  0 98  0 113 769392  13576   3476  41968 3002    0  3458     7  426     0  2  1  0 97  0 113 762284  12440   3332  34884 3151    0  3553    61  427     0  2  1  0 97   doitprod2:/var/log# grep -c processor /proc/cpuinfo  2   iostat 2   tps   Blk_czyt/s   Blk_zapis/s  Blk_czyt   Blk_zapis sda             166,00      7128,00        52,00      14256        104     Ok, after kill and start some processes is now fine. Thx for Your help anyway.
54753
I've been doing jmeter tests and have had a few OutOfMemoryExceptions, so I've bumped up the heap memory in JMeter. But now it seems I can't run anymore tests as it says I'm using 94.9% of 14Gb.  When I use df -h it says dev/sda1 is full  I was wondering if anyone can help me? I think it has to do with the JVM from the jmeter
3434
This is a  about how Unix operating systems report memory usage.   Similar Questions:                    I have production server that is running Debian 6.0.6 Squeeze  #uname -a  Linux debsrv 2.6.32-5-xen-amd64 #1 SMP Sun Sep 23 13:49:30 UTC 2012 x86_64 GNU/Linux   Every day cron executes backup script as root:  #crontab -e  0 5 * * * /root/sites_backup.sh &gt; /dev/null 2&gt;&amp;1   #nano /root/sites_backup.sh  #!/bin/bash str=`date +%Y-%m-%d-%H-%M-%S` tar pzcf /home/backups/sites/mysite-$str.tar.gz /var/sites/mysite/public_html/www mysqldump -u mysite -pmypass mysite | gzip -9 &gt; /home/backups/sites/mysite-$str.sql.gz cd /home/backups/sites/ sha512sum mysite-$str* &gt; /home/backups/sites/mysite-$str.tar.gz.DIGESTS cd ~   Everything works perfectly, but I notice that Munin's memory graph shows increase of cache and buffers after backup.  Then I just download backup files and delete them. After deletion Munin's memory graph returns cache and buffers to the state that was before backup.  Here's Munin graph:  Externally hosted image was a dead link.
118493
I'm able to find processes using top or ps. That's no problem.  Sometimes I find that some processes are taking up a lot of memory or cpu and I'm trying to identify what the root program is.  For instance, the process sort sometimes just ends up taking 2-3 gigs of memory over like 4 hours. I'd like to know what program initiated the sort process so I can try and fix it.
21798
I know that RAM disks are fast, faster than any disk, but they lose their contents on a shutdown of the operating system. The capacity is limited to the RAM. Is there a useful implementation on a new 64-bit Windows 2008 server?
21696
I am using a linux server which has 128GB of memory and 24 cores. I use top to see how much it is used. Its output is pasted at the end of the post. Here are two questions:  (1) I see that each of the running processes occupies a very small percentage of memory (%MEM no more than 0.2%, and most just 0.0%), but how the total memory is almost used as in the fourth line of output ("Mem:  130766620k total, 130161072k used,   605548k free,   919300k buffers")? The sum of used percentage of memory over all processes seems unlikely to achieve almost 100%, doesn't it?  (2) how to understand the load average on the first line ("load average: 14.04, 14.02, 14.00")?   Thanks and regards!  Edit:  Thanks!  I also really like to hear some rough numbers based on used percentage of memory to determine if a server is heavily loaded, since I once became the one who cramed the server without understanding the current load.  Is swap regarded as almost the same as memory? For example, when memory and swap are almost of same size, if the memory is almost running out but the swap is still largely free, may I just view it as if the used percentage of memory + swap is still not high and run other new processes?  How would you consider together CPU or memory (or memory + swap) usage? Do you become worried if either of them reaches too high or both?  Output of top：  $ top    top - 12:45:33 up 19 days, 23:11, 18 users,  load average: 14.04, 14.02, 14.00 Tasks: 484 total,  12 running, 472 sleeping,   0 stopped,   0 zombie Cpu(s): 36.7%us, 19.7%sy,  0.0%ni, 43.6%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st Mem:  130766620k total, 130161072k used,   605548k free,   919300k buffers Swap: 63111312k total,   500556k used, 62610756k free, 124437752k cached    PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND  6529 sanchez   18  -2 1075m 219m  13m S  100  0.2  13760:23 MATLAB 13210 timothy   18  -2 48336  37m 1216 R  100  0.0   3:56.75 absurdity 13888 timothy   18  -2 48336  37m 1204 R  100  0.0   2:04.89 absurdity 14542 timothy   18  -2 48336  37m 1196 R  100  0.0   1:08.34 absurdity 14544 timothy   18  -2  2888 2076  400 R  100  0.0   1:06.14 gatherData  6183 sanchez   18  -2 1133m 195m  13m S  100  0.2  13676:04 MATLAB  6795 sanchez   18  -2 1079m 210m  13m S  100  0.2  13734:26 MATLAB 10178 timothy   18  -2 48336  37m 1204 R  100  0.0  11:33.93 absurdity  12438 timothy   18  -2 48336  37m 1216 R  100  0.0   5:38.17 absurdity 13661 timothy   18  -2 48336  37m 1216 R  100  0.0   2:44.13 absurdity 14098 timothy   18  -2 48336  37m 1204 R  100  0.0   1:58.31 absurdity 14335 timothy   18  -2 48336  37m 1196 R  100  0.0   1:08.93 absurdity 14765 timothy   18  -2 48336  37m 1196 R   99  0.0   0:32.57 absurdity 13445 timothy   18  -2 48336  37m 1216 R   99  0.0   3:01.37 absurdity 28990 root      20   0     0    0    0 S    2  0.0  65:50.21 pdflush 12141 tim       18  -2 19380 1660 1024 R    1  0.0   0:04.04 top  1240 root      15  -5     0    0    0 S    0  0.0  16:07.11 kjournald  9019 root      20   0  296m 4460 2616 S    0  0.0  82:19.51 kdm_greet     1 root      20   0  4028  728  592 S    0  0.0   0:03.11 init     2 root      15  -5     0    0    0 S    0  0.0   0:00.00 kthreadd     3 root      RT  -5     0    0    0 S    0  0.0   0:01.01 migration/0     4 root      15  -5     0    0    0 S    0  0.0   0:08.13 ksoftirqd/0     5 root      RT  -5     0    0    0 S    0  0.0   0:00.00 watchdog/0     6 root      RT  -5     0    0    0 S    0  0.0  17:27.31 migration/1     7 root      15  -5     0    0    0 S    0  0.0   0:01.21 ksoftirqd/1     8 root      RT  -5     0    0    0 S    0  0.0   0:00.00 watchdog/1     9 root      RT  -5     0    0    0 S    0  0.0  10:02.56 migration/2    10 root      15  -5     0    0    0 S    0  0.0   0:00.34 ksoftirqd/2    11 root      RT  -5     0    0    0 S    0  0.0   0:00.00 watchdog/2    12 root      RT  -5     0    0    0 S    0  0.0   4:29.53 migration/3    13 root      15  -5     0    0    0 S    0  0.0   0:00.34 ksoftirqd/3
99988
. Thanks, Apple!   by creating two files. In the tutorial max. processes is at 2048.  Did this. Problem is: my max. processes per user is 2500. Found out via try &amp; error. Great stuff!  Why? Why can't I go over this number? Tried 2600, after reboot uname -a shows 1064. What is this number, why exactly 1064? Why am I limited in user processes anyway? The default number was 709...  P.S.: for those who wonder why I need such a "high" number: it's because of JMeter and the thread handling there. If I don't manually edit the maxproc, JMeter just won't run properly. Or not at all.
75558
As you will probably work out from my profile, I'm a software developer. This is sort of a software development question, but I think this is more suited to English language too.  Feel free to migrate if you think the question does not belong here.  Say I want to refer to the data size, or capacity of something:   A floppy disk can hold 1.44 megabytes of data. My flash drive can hold 16 gigabytes of data. My internet connection can operate at a maximum of 50 gigabits per second I have just managed to compress a file from 1 megabyte to just 200 kilobytes.   How do I collectively refer to these units of data size/capacity?
101503
How do I break a large, +4GB file into smaller files of about 500MB each.   And how do I re-assemble them again to get the original file?
87760
My specific question is with the ASUS M3N78-VM motherboard that my home server uses. I currently have 4x2GB installed for a total of 8GB but I was hoping to upgrade to say 16GB (4x4GB). The official specifications of that motherboard says it only supports up to 8GB but it was released back when only 2GB sticks were available. What, if any, would prevent it from working with 4GB sticks now that 4GB sticks are available?  My general question is with motherboards in general... what would prevent a motherboard from working with bigger sticks if its all just the same type (DDR2 for example and same speeds) of memory?