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Virtual Learning Platforms Thread, Ubuntu / Moodle REALLY SLOOOOWWWWW in Technical; Which apache2 package did you install? Code: sudo dpkg -l '*apache2*'...
  1. #31

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    Re: Ubuntu / Moodle REALLY SLOOOOWWWWW

    Which apache2 package did you install?

    Code:
    sudo dpkg -l '*apache2*'

  2. #32
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    Re: Ubuntu / Moodle REALLY SLOOOOWWWWW

    Sorry just saw your post above.

  3. #33
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    Re: Ubuntu / Moodle REALLY SLOOOOWWWWW

    output from dkpg -l '*apache2*':

    Code:
    Desired=Unknown/Install/Remove/Purge/Hold
    | Status=Not/Installed/Config-files/Unpacked/Failed-config/Half-installed
    |/ Err?=(none)/Hold/Reinst-required/X=both-problems (Status,Err: uppercase=bad)
    ||/ Name           Version        Description
    +++-==============-==============-============================================
    ii  apache2        2.0.55-4ubuntu next generation, scalable, extendable web se
    ii  apache2-common 2.0.55-4ubuntu next generation, scalable, extendable web se
    un  apache2-doc    <none>         (no description available)
    un  apache2-module <none>         (no description available)
    un  apache2-mpm-pe <none>         (no description available)
    ii  apache2-mpm-pr 2.0.55-4ubuntu traditional model for Apache2
    un  apache2-mpm-th <none>         (no description available)
    un  apache2-mpm-wo <none>         (no description available)
    ii  apache2-utils  2.0.55-4ubuntu utility programs for webservers
    un  libapache2-mod <none>         (no description available)
    un  libapache2-mod <none>         (no description available)
    ii  libapache2-mod 5.1.2-1ubuntu3 server-side, HTML-embedded scripting languag
    Looks to me like it's running in PR.

    Have edited the required sections of the.conf file for apache2 and restarted apache2.

    Will run a test this morning under load (about 30 kids) and let you know how it goes.

  4. #34
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    Re: Ubuntu / Moodle REALLY SLOOOOWWWWW

    Results from top:

    Code:
    top - 09:53:19 up 18:49,  2 users,  load average: 8.17, 4.52, 1.89
    Tasks:  99 total,  22 running,  72 sleeping,   3 stopped,   2 zombie
    Cpu(s): 97.8% us,  2.2% sy,  0.0% ni,  0.0% id,  0.0% wa,  0.0% hi,  0.0% si
    Mem:   2073948k total,   724460k used,  1349488k free,    93360k buffers
    Swap:  1469908k total,        0k used,  1469908k free,   166060k cached
    
      PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
    18398 www-data  15   0 32596  18m 3640 S   19  0.9   0:07.17 apache2
    18833 www-data  16   0 30024  15m 3524 R   18  0.8   0:03.65 apache2
    18802 www-data  16   0 31768  17m 3756 R   17  0.9   0:06.64 apache2
    18356 www-data  16   0 30280  16m 4604 R   17  0.8   0:07.86 apache2
    18668 www-data  16   0 32760  18m 3572 R   15  0.9   0:06.84 apache2
    18800 www-data  15   0 37776  23m 3600 S   14  1.1   0:06.08 apache2
    18271 www-data  15   0 37892  23m 3608 S   14  1.2   0:08.25 apache2
    18389 www-data  16   0 32416  17m 3548 R   12  0.9   0:08.68 apache2
    17898 www-data  16   0 38092  24m 4724 S   10  1.2   0:16.47 apache2
    18366 www-data  16   0 32560  18m 3592 S   10  0.9   0:06.82 apache2
    18828 www-data  16   0 30132  15m 3556 S    9  0.8   0:02.81 apache2
    19132 www-data  16   0 30052  15m 3496 S    9  0.8   0:01.46 apache2
    18575 www-data  16   0 30052  15m 3572 R    8  0.8   0:06.95 apache2
    18793 www-data  17   0 38620  24m 3616 R    7  1.2   0:04.03 apache2
    19134 www-data  17   0 29204  14m 3296 R    4  0.7   0:00.50 apache2
    18396 www-data  15   0 38576  24m 3652 R    4  1.2   0:08.93 apache2
    18830 www-data  16   0 29468  14m 3404 R    3  0.7   0:02.41 apache2
    18400 www-data  17   0 33216  19m 4628 R    2  1.0   0:09.82 apache2
     3950 mysql     15   0  133m  25m 4768 S    2  1.2   0:47.68 mysqld
    18371 www-data  15   0 31360  16m 3548 S    2  0.8   0:08.16 apache2
    19122 www-data  15   0 29448  14m 3400 S    2  0.7   0:01.44 apache2
    18353 www-data  16   0 37904  23m 3608 R    1  1.2   0:09.33 apache2
    18402 www-data  16   0 30148  15m 3576 R    1  0.8   0:07.16 apache2
    18776 www-data  17   0 29476  14m 3404 R    1  0.7   0:03.34 apache2
    17111 root      16   0  2196 1132  856 R    0  0.1   0:00.78 top
        1 root      16   0  1568  532  460 S    0  0.0   0:01.44 init
        2 root      RT   0     0    0    0 S    0  0.0   0:00.14 migration/0
        3 root      34  19     0    0    0 S    0  0.0   0:00.00 ksoftirqd/0
        4 root      RT   0     0    0    0 S    0  0.0   0:00.00 watchdog/0
        5 root      RT   0     0    0    0 S    0  0.0   0:00.11 migration/1
        6 root      34  19     0    0    0 S    0  0.0   0:00.00 ksoftirqd/1
        7 root      RT   0     0    0    0 S    0  0.0   0:00.00 watchdog/1
        8 root      10  -5     0    0    0 S    0  0.0   0:00.07 events/0
        9 root      10  -5     0    0    0 S    0  0.0   0:00.04 events/1
       10 root      11  -5     0    0    0 S    0  0.0   0:00.01 khelper
       11 root      10  -5     0    0    0 S    0  0.0   0:00.00 kthread
       14 root      10  -5     0    0    0 S    0  0.0   0:00.01 kblockd/0
       15 root      10  -5     0    0    0 S    0  0.0   0:00.00 kblockd/1
       16 root      20  -5     0    0    0 S    0  0.0   0:00.00 kacpid
      152 root      20   0     0    0    0 S    0  0.0   0:00.00 pdflush
    Results from apachetop:

    Code:
    last hit: 08:53:54         atop runtime:  0 days, 00:01:43             08:53:55
    All:          730 reqs (   7.2/sec)       5909.4K (   57.9K/sec)    8289.4B/req
    2xx:     567 (77.7%) 3xx:     160 (21.9%) 4xx:     2 ( 0.3%) 5xx:     1 ( 0.1%)
    R ( 30s):     245 reqs (   8.2/sec)       2229.5K (   74.3K/sec)    9318.5B/req
    2xx:     176 (71.8%) 3xx:      69 (28.2%) 4xx:     0 ( 0.0%) 5xx:     0 ( 0.0%)
    
     REQS REQ/S    KB KB/S URL
       45  1.50 183.8  6.1*/vle/mod/chat/gui_header_js/jsupdate.php
       24  0.80  15.5  0.5 /vle/theme/standardwhite/styles.php
       22  0.73  1562 52.1 /vle/theme/standard/styles.php
       12  0.40   3.5  0.1 /vle/mod/chat/gui_header_js/insert.php
       11  0.37   2.1  0.1 /vle/mod/chat/empty.php
        8  0.28 128.8  4.4 /vle/course/view.php
        6  0.32   0.7  0.0 /vle/theme/standardwhite/gradient.jpg
        6  0.32   0.1  0.0 /vle/pix/spacer.gif
        6  0.20  63.8  2.1 /vle/mod/chat/gui_header_js/users.php
        6  0.22  31.2  1.2 /vle/login/index.php
        6  0.32   0.2  0.0 /vle/pix/t/switch_minus.gif
        4  0.17  48.3  2.1 /vle/mod/quiz/attempt.php
        3  0.11   3.9  0.1 /vle/message/refresh.php
        3  0.12   0.7  0.0 /vle/pix/help.gif
        3  0.25   0.0  0.0 /vle/pix/i/grades.gif
        3  0.25   0.0  0.0 /vle/mod/assignment/icon.gif
        3  0.25   0.0  0.0 /vle/mod/chat/icon.gif
        3  0.25   0.0  0.0 /vle/mod/choice/icon.gif
        3  0.25   0.0  0.0 /vle/pix/i/users.gif
        3  0.10   2.7  0.1 /vle/pix/i/key.gif
        3  0.25   0.0  0.0 /vle/mod/glossary/icon.gif
        3  0.25   0.0  0.0 /vle/mod/quiz/icon.gif
        3  0.25   0.0  0.0 /vle/mod/resource/icon.gif
        3  0.25   0.0  0.0 /vle/mod/survey/icon.gif
        3  0.14  25.3  1.1 /vle/lib/javascript-static.js
        3  0.25   0.0  0.0 /vle/pix/i/course.gif
        3  0.25   0.0  0.0 /vle/pix/i/one.gif
        3  0.25   0.0  0.0 /vle/pix/f/web.gif
        3  0.25   0.0  0.0 /vle/pix/f/pdf.gif
        3  0.25   0.0  0.0 /vle/pix/f/word.gif
        3  0.25   0.0  0.0 /vle/mod/forum/icon.gif
        3  0.16   5.1  0.3 /vle/pix/moodlelogo.gif
        3  0.16  62.8  3.3 /vle/lib/overlib.js
        3  0.14  36.0  1.6 /vle/
        3  0.14   1.3  0.1 /vle/theme/standard/styles_ie7.css
        3  0.16   0.7  0.0 /vle/calendar/overlib.cfg.php
        3  0.16   4.7  0.2 /vle/lib/cookies.js
        3  0.16  22.0  1.2 /vle/lib/ufo.js
        2  0.11   0.1  0.0 /vle/lib/javascript-mod.php
        2  0.17  13.3  1.1 /vle/course/category.php
        1  0.04   1.4  0.1 /vle/message/send.php
        1  0.05   0.3  0.0 /vle/pix/i/cross_red_big.gif
        1  0.50   0.3  0.2 /vle/pix/i/tick_green_big.gif
        1  0.06   0.3  0.0 /vle/theme/standard/pix/tab/left_hover.gif
        1  0.06   2.7  0.2 /vle/theme/standard/pix/tab/right_hover.gif
        1  0.06   0.1  0.0 /vle/pix/i/tick_green_small.gif
        1  0.10   5.9  0.6 /vle/course/enrol.php
    This was under load with 28 kids.

  5. #35

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    Re: Ubuntu / Moodle REALLY SLOOOOWWWWW

    Right, next step is to use a PHP Accelerator. Have a look at this blog post on how to do that. The only other suggestion I would make after implementing the accelerator, is to put it's cache on tmpfs.

    First:
    Code:
    sudo mkdir /var/tmp/phpcache
    sudo chown www-data.www-data /var/tmp/phpcache
    sudo mount -t tmpfs tmpfs /var/tmp/phpcache
    Then in /etc/fstab:
    Code:
    tmpfs /var/tmp/phpcache tmpfs defaults 0 0
    Then in php.ini
    Code:
    phpa.cache_dir = /var/tmp/phpcache
    And restart Apache:
    Code:
    sudo /etc/init.d/apache2 restart

  6. #36
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    Re: Ubuntu / Moodle REALLY SLOOOOWWWWW

    Geoff, Thanks again for all your help on this, tutor is reporting a great increase in performance and loads are stables in the low 0.40

    Thanks agin

  7. #37

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    Re: Ubuntu / Moodle REALLY SLOOOOWWWWW

    No problem. It's a shame the default config for apache is so useless in most distros. Really gives a poor impression to new users

    Ah well, enjoy your new server and I hope you learned something

    I might retool this thread as a howto/wiki article.

  8. #38

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    Re: Ubuntu / Moodle REALLY SLOOOOWWWWW

    Yes, thanks Geoff. This will be useful to me in the near future I can imagine

  9. #39
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    Re: Ubuntu / Moodle REALLY SLOOOOWWWWW

    As a linux n00b yes Ihave learned alot from this so many thanks.

    Us windoze people are very much shielded from this kinda stuff and it is certainly refreshing to "get stuck in" to something new.

  10. #40
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    Re: Ubuntu / Moodle REALLY SLOOOOWWWWW

    Just a quick update: did a load test with 120 students hitting the chat room on moodle and got the following load result:

    Code:
    load average: 0.14, 0.04, 0.01
    Man thanks to geoff, problem sorted ;-)

  11. #41

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    Re: Ubuntu / Moodle REALLY SLOOOOWWWWW

    How about memory and i/o?

  12. #42
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    Re: Ubuntu / Moodle REALLY SLOOOOWWWWW

    This is the complete top output for the above load:

    Code:
    top - 14:14:01 up 23:10,  1 user,  load average: 0.14, 0.04, 0.01
    Tasks:  76 total,   1 running,  72 sleeping,   3 stopped,   0 zombie
    Cpu(s):  6.5% us,  1.3% sy,  0.0% ni, 92.0% id,  0.2% wa,  0.0% hi,  0.0% si
    Mem:   2073948k total,   529480k used,  1544468k free,   106192k buffers
    Swap:  1469908k total,        0k used,  1469908k free,   264272k cached
    
      PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
     4524 www-data  16   0 52444  14m  10m S    3  0.7   0:00.21 apache2
     4318 www-data  16   0 52376  14m  10m S    2  0.7   0:00.55 apache2
     3950 mysql     15   0  133m  25m 4768 S    2  1.3   1:01.83 mysqld
     3373 www-data  15   0 54048  23m  18m S    2  1.2   0:01.67 apache2
     4400 www-data  15   0 52364  13m  10m S    1  0.7   0:00.38 apache2
     4094 www-data  16   0 53280  17m  13m S    1  0.9   0:01.09 apache2
     4217 www-data  15   0 53508  17m  13m S    1  0.9   0:00.53 apache2
     4223 www-data  16   0 54060  21m  16m S    1  1.1   0:01.20 apache2
     4320 www-data  17   0 53340  16m  12m S    1  0.8   0:00.42 apache2
     4383 www-data  16   0 52240  12m 9468 S    1  0.6   0:00.22 apache2
     3982 root      16   0  7688 2480 2056 S    0  0.1   0:00.11 sshd
     4012 root      16   0  2200 1108  856 R    0  0.1   0:00.23 top
        1 root      17   0  1568  532  460 S    0  0.0   0:01.55 init
        2 root      RT   0     0    0    0 S    0  0.0   0:00.17 migration/0
        3 root      34  19     0    0    0 S    0  0.0   0:00.00 ksoftirqd/0
        4 root      RT   0     0    0    0 S    0  0.0   0:00.00 watchdog/0
        5 root      RT   0     0    0    0 S    0  0.0   0:00.12 migration/1
        6 root      34  19     0    0    0 S    0  0.0   0:00.00 ksoftirqd/1
        7 root      RT   0     0    0    0 S    0  0.0   0:00.00 watchdog/1
        8 root      10  -5     0    0    0 S    0  0.0   0:00.07 events/0
        9 root      10  -5     0    0    0 S    0  0.0   0:00.04 events/1
       10 root      11  -5     0    0    0 S    0  0.0   0:00.01 khelper
       11 root      10  -5     0    0    0 S    0  0.0   0:00.00 kthread
       14 root      10  -5     0    0    0 S    0  0.0   0:00.01 kblockd/0
       15 root      10  -5     0    0    0 S    0  0.0   0:00.00 kblockd/1
       16 root      20  -5     0    0    0 S    0  0.0   0:00.00 kacpid
      152 root      20   0     0    0    0 S    0  0.0   0:00.00 pdflush
      153 root      15   0     0    0    0 S    0  0.0   0:00.04 pdflush
      154 root      25   0     0    0    0 S    0  0.0   0:00.00 kswapd0
      155 root      15  -5     0    0    0 S    0  0.0   0:00.00 aio/0
      156 root      15  -5     0    0    0 S    0  0.0   0:00.00 aio/1
      744 root      10  -5     0    0    0 S    0  0.0   0:00.00 kseriod
      830 root      15   0     0    0    0 S    0  0.0   0:00.00 kirqd
     1756 root      11  -5     0    0    0 S    0  0.0   0:00.00 scsi_eh_0
     1875 root      10  -5     0    0    0 S    0  0.0   0:00.00 khubd
     1982 root      15   0     0    0    0 S    0  0.0   0:00.58 kjournald
     2184 root      12  -4  2108  552  368 S    0  0.0   0:00.40 udevd
     2998 root      20   0     0    0    0 S    0  0.0   0:00.00 shpchpd_event
     3507 daemon    16   0  1668  364  272 S    0  0.0   0:00.00 portmap
     3809 root      16   0  1684  500  412 S    0  0.0   0:00.05 dd
     3811 klog      19   0  2408 1332  388 S    0  0.1   0:00.06 klogd
     3851 root      18   0 12552 2420 1364 S    0  0.1   0:00.00 slapd
     3882 root      24   0  2640 1312 1064 S    0  0.1   0:00.01 mysqld_safe
     3951 root      24   0  1548  500  432 S    0  0.0   0:00.00 logger
     3958 dhcp      14  -2  2340  600  296 S    0  0.0   0:00.03 dhclient3
     4103 root      16   0  4660 1600 1296 S    0  0.1   0:00.09 master
     4121 root      17   0  4760 1056  756 S    0  0.1   0:00.08 sshd
     4150 root      16   0  2908  996  840 S    0  0.0   0:00.46 famd
     4173 root      16   0  1624  296  232 S    0  0.0   0:00.00 mdadm

  13. #43

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    Re: Ubuntu / Moodle REALLY SLOOOOWWWWW

    Much better.

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