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forum killing my server


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Hi
I run my IBP forum on a dedicated server, we have no other sites sharing resources, just one IPB forum
The forum has around 4 million posts and 60,000 members with an average at anyone time of around 300 members and 8 or 900 guests online

our server specs are

Server type: Hp DL180 G6
Processor type: Intel Quad-Core Xeon E5504
Processor speed: 2000Mhz
Number of CPUs: 2
Number of cores: 4
RAM: 32GB

Hard disks :4 × 1TB
Hardware RAID:

Most of the time the site runs fine, uploads are quick, posts are made fast but for the last couple of months several times a day our mysql db seems to spiral out of control, eats up all of the processor power quickly followed by all the ram until it becomes completely unresponsive, sometimes it bounces back up after a few minutes, other times it can be out for several hours and we have to restart mysql and apache to get the site back online again

We recently doubled our ram from 16gb to 32gb which seemed to work for a few weeks but now the problem is back and his happening more frequently, probably every couple of hours now leaving us offline more than on

this is a quick cut n paste of the top readout an ACP that i grabbed yesterday before it died
 

System Software Linux WJI.local 2.6.32-5-amd64 #1 SMP Sun May 6 04:00:17 UTC 2012 x86_64
Current Server Load 6.68
Total Server Memory 32236 MB
Available Server Memory 3677 MB

System Processes

top - 14:44:43 up 89 days, 39 min, 0 users, load average: 10.55, 3.47, 1.73
Tasks: 301 total, 12 running, 288 sleeping, 0 stopped, 1 zombie
Cpu(s): 7.6%us, 1.6%sy, 0.0%ni, 90.3%id, 0.5%wa, 0.0%hi, 0.1%si, 0.0%st
Mem: 33010436k total, 29056044k used, 3954392k free, 840556k buffers
Swap: 3999992k total, 35568k used, 3964424k free, 21390048k cached

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
31468 mysql 20 0 735m 124m 7464 S 242 0.4 11187:51 mysqld
27900 www-data 20 0 325m 62m 5168 R 36 0.2 0:00.72 apache2
27879 www-data 20 0 324m 62m 4172 S 20 0.2 0:00.49 apache2
27954 www-data 20 0 323m 61m 4008 S 20 0.2 0:00.41 apache2
27758 www-data 20 0 307m 44m 5548 R 18 0.1 0:01.79 apache2
27816 www-data 20 0 326m 64m 5328 S 14 0.2 0:01.00 apache2
27919 www-data 20 0 313m 51m 4236 R 14 0.2 0:00.34 apache2
27993 www-data 20 0 302m 40m 4248 S 14 0.1 0:00.41 apache2
10028 root 0 -20 0 0 0 S 13 0.0 77:37.81 hcp_watchdog
27814 www-data 20 0 320m 59m 5024 S 13 0.2 0:00.69 apache2

any advice gratefully received

 

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IP.Board Version v3.4.5 (ID:34011)
MYSQL Version MYSQL 5.1.63-0+squeeze1
PHP Version 5.3.3-7+squeeze19 (apache2handler) ( PHP INFO )
Disabled PHP Functions No Information
Loaded Extensions Core, PDO, Phar, Reflection, SPL, SQLite, SimpleXML, apache2handler, bcmath, bz2, calendar, ctype, curl, date, dba, dom, ereg, exif, fileinfo, filter, ftp, gd, gettext, hash, iconv, imap, ionCube Loader, json, libxml, mbstring, mhash, mysql, mysqli, openssl, pcre, pdo_mysql, pdo_sqlite, posix, session, shmop, soap, sockets, sqlite3, standard, suhosin, sysvmsg, sysvsem, sysvshm, tokenizer, wddx, xml, xmlreader, xmlwriter, xsl, zip, zlib
Safe Mode OFF
System Software Linux WJIF002.local 2.6.32-5-amd64 #1 SMP Sun May 6 04:00:17 UTC 2012 x86_64
Current Server Load 95.91
Total Server Memory 32236 MB
Available Server Memory 100 MB

System Processes

top - 16:13:24 up 91 days, 2:08, 0 users, load average: 97.32, 61.13, 43.50
Tasks: 319 total, 3 running, 316 sleeping, 0 stopped, 0 zombie
Cpu(s): 7.6%us, 1.6%sy, 0.0%ni, 90.1%id, 0.6%wa, 0.0%hi, 0.1%si, 0.0%st
Mem: 33010436k total, 32906184k used, 104252k free, 795500k buffers
Swap: 3999992k total, 45952k used, 3954040k free, 26170764k cached

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1865 mysql 20 0 666m 134m 7800 S 214 0.4 296:08.24 mysqld
17577 www-data 20 0 310m 48m 4860 S 39 0.2 0:00.57 apache2
17587 www-data 20 0 290m 28m 4036 R 16 0.1 0:00.08 apache2
17572 www-data 20 0 282m 21m 4436 R 8 0.1 0:00.32 apache2
10028 root 0 -20 0 0 0 S 6 0.0 90:46.05 hcp_watchdog
79 root 20 0 0 0 0 S 4 0.0 3:23.10 kswapd0
80 root 20 0 0 0 0 S 2 0.0 3:06.05 kswapd1
10029 root 25 5 363m 34m 3168 S 2 0.1 512:34.01 cdp-2-6
17599 www-data 20 0 19200 1428 920 R 2 0.0 0:00.02 top
1 root 20 0 8356 568 536 S 0 0.0 0:53.63 init
2 root 20 0 0 0 0 S 0 0.0 0:00.00 kthreadd
3 root RT 0 0 0 0 S 0 0.0 0:09.68 migration/0

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It is better to give more details like:

When it happen, is it every day? is it at the same time daily? is it every x minutes?

Post Apache configuration like workers and related limits...

Post php configuration setings

Post a mysql report using mysqltuner script

So we can have a better idea and will be able to help you :)

From the first side it seems that something is running in the background (but you say not) maybe a plugin/addon, the second one is that you have very low numbers on configuration and requests are waiting or running for ever and third that you are under attack as Ahmad already note....

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I think i may have found the cause, I could be wrong though

we installed a new hook shortly before this issue started

would that cause issues on a busy board ?

I've disabled it and the server load dropped straight away

 

Yes, there are a lot of developers creating hooks that don't always take into account a large site with heavy traffic on it, and a lot of times they don't have such a site to test on. An example of this, if you add 5 extra queries to a page, and they are longer queries etc, on a site with 50 people on it, not a big deal in most cases, take that same item on a site with 5000 people on it, and you have an explosion of mysql. 

 

 

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I currently have 280 members and 743 guests online and server load is sat between 0.14 and 0.50

Available Server Memory 24144 MB which is all about normal

certainly better than a server load of 100 and 99mb of ram left which it was earlier today :lol:

 

fingers crossed disabling the hook has cured my problem

 

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I currently have 280 members and 743 guests online and server load is sat between 0.14 and 0.50

Available Server Memory 24144 MB which is all about normal

certainly better than a server load of 100 and 99mb of ram left which it was earlier today :lol:

 

fingers crossed disabling the hook has cured my problem

 

Also, for a site like yours, i would recommend you switching to MariaDB 10. It makes a HUGE difference in terms of speed compared to your MySQL 5.1(which is outdated anyway).

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If you should wish to enable the hook for your members again, then it could work better if you use the setting to exclude it for guests, since they will "always" be the largest portion of visitors and may not feel it's as useful.

Depends of course on the level of activity that makes it crumble and whether the hook author have written the code so the queries are not being run. (Some authors simply only do the view logic in template, which is not good enough)

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Also, for a site like yours, i would recommend you switching to MariaDB 10. It makes a HUGE difference in terms of speed compared to your MySQL 5.1(which is outdated anyway).

Yes it will be much better to use Nginx and MariaDB :)

​Never heard to these?  Is it part of C-Panel or ? ? 

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Changing your server configuration to work around a poorly coded hook isn't the ideal situation, while improving your performance is always a good thing, I wouldn't look at that alone as a long term solution to the hook causing the issue.

I would report this to the author of the hook so perhaps they can improve their coding and queries to perform better on a busier site.  :) 

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  • 2 weeks later...

as an up date to this, the server is running better since the hook was uninstalled

However we seem to be losing a couple of GB of RAM each day until there isn't enough left and then the server crashes

for instance we shut down Apache and run optimize repair db via SSH and after completion we have around 24gb out of 32 gb available server memory

then over the course of a few days the available memory gradually drops, once we have around 10gb left a crash follows shortly afterwards

its the post table that I think is causing the problem, we have almost 4 million posts and around 1200 new posts each day and as the available ram drops so posting, editing, deleting all take longer and longer to complete

anything i can do to stop this ?

 

 

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What is consuming your Ram? Mysql?

Can you post here your my.cnf configuration?

​Not sure what's consuming it or where to find my.cnf, I don't have a server admin atm and my skills are pretty limited :(

this is the read out from the diagnostics in ACP

the available memory was sat at around 12.5 gb this morning but over the course of today it dropped down to around 10.5gb

 

System Software Linux WJIFlocal 2.6.32-5-amd64 #1 SMP Sun May 6 04:00:17 UTC 2012 x86_64
Current Server Load 0.32
Total Server Memory 32236 MB
Available Server Memory 10801 MB

 

System Processes

top - 16:11:26 up 107 days,  2:08,  0 users,  load average: 0.27, 0.54, 0.53
Tasks: 178 total,   1 running, 177 sleeping,   0 stopped,   0 zombie
Cpu(s):  7.6%us,  1.7%sy,  0.0%ni, 90.0%id,  0.6%wa,  0.0%hi,  0.1%si,  0.0%st
Mem:  33010436k total, 21950676k used, 11059760k free,   851020k buffers
Swap:  3999992k total,    52136k used,  3947856k free, 17849340k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND            
30919 www-data  20   0  300m  38m 5972 S   39  0.1   0:33.68 apache2            
23819 nginx     20   0 38652 9604 1640 S    2  0.0   2:52.39 nginx              
26381 mysql     20   0  604m 101m 7824 S    2  0.3   1974:02 mysqld             
    1 root      20   0  8356  568  536 S    0  0.0   1:01.90 init               
    2 root      20   0     0    0    0 S    0  0.0   0:00.00 kthreadd           
    3 root      RT   0     0    0    0 S    0  0.0   0:11.25 migration/0        
    4 root      20   0     0    0    0 S    0  0.0   1:46.89 ksoftirqd/0        
    5 root      RT   0     0    0    0 S    0  0.0   0:00.00 watchdog/0         
    6 root      RT   0     0    0    0 S    0  0.0   0:06.90 migration/1        
    7 root      20   0     0    0    0 S    0  0.0   0:23.70 ksoftirqd/1        
    8 root      RT   0     0    0    0 S    0  0.0   0:00.00 watchdog/1         
    9 root      RT   0     0    0    0 S    0  0.0   0:01.70 migration/2        
   10 root      20   0     0    0    0 S    0  0.0   0:15.32 ksoftirqd/2        
   11 root      RT   0     0    0    0 S    0  0.0   0:00.00 watchdog/2         
   12 root      RT   0     0    0    0 S    0  0.0   0:00.70 migration/3        
   13 root      20   0     0    0    0 S    0  0.0   0:11.11 ksoftirqd/3        
   14 root      RT   0     0    0    0 S    0  0.0   0:00.00 watchdog/3         
   15 root      RT   0     0    0    0 S    0  0.0   0:14.58 migration/4        
   16 root      20   0     0    0    0 S    0  0.0   0:55.56 ksoftirqd/4        
   17 root      RT   0     0    0    0 S    0  0.0   0:00.00 watchdog/4         
   18 root      RT   0     0    0    0 S    0  0.0   0:10.63 migration/5        
   19 root      20   0     0    0    0 S    0  0.0   0:20.03 ksoftirqd/5        
   20 root      RT   0     0    0    0 S    0  0.0   0:00.00 watchdog/5         
   21 root      RT   0     0    0    0 S    0  0.0   0:02.66 migration/6        
   22 root      20   0     0    0    0 S    0  0.0   0:12.98 ksoftirqd/6        
   23 root      RT   0     0    0    0 S    0  0.0   0:00.00 watchdog/6         
   24 root      RT   0     0    0    0 S    0  0.0   0:01.02 migration/7        
   25 root      20   0     0    0    0 S    0  0.0   0:08.10 ksoftirqd/7        
   26 root      RT   0     0    0    0 S    0  0.0   0:00.00 watchdog/7         
   27 root      20   0     0    0    0 S    0  0.0   1:44.10 events/0           
   28 root      20   0     0    0    0 S    0  0.0   0:57.76 events/1           
   29 root      20   0     0    0    0 S    0  0.0   6:59.45 events/2           
   30 root      20   0     0    0    0 S    0  0.0   0:50.75 events/3           
   31 root      20   0     0    0    0 S    0  0.0   3:02.45 events/4           
   32 root      20   0     0    0    0 S    0  0.0   1:07.61 events/5           
   33 root      20   0     0    0    0 S    0  0.0   0:44.68 events/6           
   34 root      20   0     0    0    0 S    0  0.0   0:29.19 events/7           
   35 root      20   0     0    0    0 S    0  0.0   0:00.00 cpuset             
   36 root      20   0     0    0    0 S    0  0.0   0:00.00 khelper            
   37 root      20   0     0    0    0 S    0  0.0   0:00.00 netns              
   38 root      20   0     0    0    0 S    0  0.0   0:00.00 async/mgr          
   39 root      20   0     0    0    0 S    0  0.0   0:00.00 pm                 
   40 root      20   0     0    0    0 S    0  0.0   0:10.04 sync_supers        
   41 root      20   0     0    0    0 S    0  0.0   0:11.81 bdi-default        
   42 root      20   0     0    0    0 S    0  0.0   0:00.00 kintegrityd/0      
   43 root      20   0     0    0    0 S    0  0.0   0:00.00 kintegrityd/1      
   44 root      20   0     0    0    0 S    0  0.0   0:00.00 kintegrityd/2      
   45 root      20   0     0    0    0 S    0  0.0   0:00.00 kintegrityd/3      
   46 root      20   0     0    0    0 S    0  0.0   0:00.00 kintegrityd/4      
   47 root      20   0     0    0    0 S    0  0.0   0:00.00 kintegrityd/5      
   48 root      20   0     0    0    0 S    0  0.0   0:00.00 kintegrityd/6      
   49 root      20   0     0    0    0 S    0  0.0   0:00.00 kintegrityd/7      
   50 root      20   0     0    0    0 S    0  0.0   1:11.33 kblockd/0          
   51 root      20   0     0    0    0 S    0  0.0   0:00.90 kblockd/1          
   52 root      20   0     0    0    0 S    0  0.0   0:00.58 kblockd/2          
   53 root      20   0     0    0    0 S    0  0.0   0:00.40 kblockd/3          
   54 root      20   0     0    0    0 S    0  0.0   1:05.02 kblockd/4          
   55 root      20   0     0    0    0 S    0  0.0   0:00.68 kblockd/5          
   56 root      20   0     0    0    0 S    0  0.0   0:00.37 kblockd/6          
   57 root      20   0     0    0    0 S    0  0.0   0:00.26 kblockd/7          
   58 root      20   0     0    0    0 S    0  0.0   0:00.00 kacpid             
   59 root      20   0     0    0    0 S    0  0.0   0:00.00 kacpi_notify       
   60 root      20   0     0    0    0 S    0  0.0   0:00.00 kacpi_hotplug      
   61 root      20   0     0    0    0 S    0  0.0   0:00.00 kseriod            
   70 root      20   0     0    0    0 S    0  0.0   0:00.00 kondemand/0        
   71 root      20   0     0    0    0 S    0  0.0   0:00.00 kondemand/1        
   72 root      20   0     0    0    0 S    0  0.0   0:00.00 kondemand/2        
   73 root      20   0     0    0    0 S    0  0.0   0:00.00 kondemand/3        
   74 root      20   0     0    0    0 S    0  0.0   0:00.00 kondemand/4        
   75 root      20   0     0    0    0 S    0  0.0   0:00.00 kondemand/5        
   76 root      20   0     0    0    0 S    0  0.0   0:00.00 kondemand/6        
   77 root      20   0     0    0    0 S    0  0.0   0:00.00 kondemand/7        
   78 root      20   0     0    0    0 S    0  0.0   0:03.87 khungtaskd         
   79 root      20   0     0    0    0 S    0  0.0   4:27.98 kswapd0            
   80 root      20   0     0    0    0 S    0  0.0   4:05.13 kswapd1            
   81 root      25   5     0    0    0 S    0  0.0   0:00.00 ksmd               
   82 root      20   0     0    0    0 S    0  0.0   0:00.00 aio/0              
   83 root      20   0     0    0    0 S    0  0.0   0:00.00 aio/1              
   84 root      20   0     0    0    0 S    0  0.0   0:00.00 aio/2              
   85 root      20   0     0    0    0 S    0  0.0   0:00.00 aio/3              
   86 root      20   0     0    0    0 S    0  0.0   0:00.00 aio/4              
   87 root      20   0     0    0    0 S    0  0.0   0:00.00 aio/5              
   88 root      20   0     0    0    0 S    0  0.0   0:00.00 aio/6              
   89 root      20   0     0    0    0 S    0  0.0   0:00.00 aio/7              
   90 root      20   0     0    0    0 S    0  0.0   0:00.00 crypto/0           
   91 root      20   0     0    0    0 S    0  0.0   0:00.00 crypto/1           
   92 root      20   0     0    0    0 S    0  0.0   0:00.00 crypto/2           
   93 root      20   0     0    0    0 S    0  0.0   0:00.00 crypto/3           
   94 root      20   0     0    0    0 S    0  0.0   0:00.00 crypto/4           
   95 root      20   0     0    0    0 S    0  0.0   0:00.00 crypto/5           
   96 root      20   0     0    0    0 S    0  0.0   0:00.00 crypto/6           
   97 root      20   0     0    0    0 S    0  0.0   0:00.00 crypto/7           
  312 root      20   0     0    0    0 S    0  0.0   0:00.00 ksuspend_usbd      
  313 root      20   0     0    0    0 S    0  0.0   0:00.00 khubd              
  314 root      20   0     0    0    0 S    0  0.0   0:00.00 cciss_scan         
  326 root      20   0     0    0    0 S    0  0.0   0:00.00 ata/0              
  327 root      20   0     0    0    0 S    0  0.0   0:00.00 ata/1              
  328 root      20   0     0    0    0 S    0  0.0   0:00.00 ata/2              
  329 root      20   0     0    0    0 S    0  0.0   0:00.00 ata/3              
  330 root      20   0     0    0    0 S    0  0.0   0:00.00 ata/4              
  331 root      20   0     0    0    0 S    0  0.0   0:00.00 ata/5              
  332 root      20   0     0    0    0 S    0  0.0   0:00.00 ata/6              
  333 root      20   0     0    0    0 S    0  0.0   0:00.00 ata/7              
  334 root      20   0     0    0    0 S    0  0.0   0:00.00 ata_aux            
  337 root      20   0     0    0    0 S    0  0.0   0:00.00 scsi_eh_0          
  338 root      20   0     0    0    0 S    0  0.0   0:00.00 scsi_eh_1          
  339 root      20   0     0    0    0 S    0  0.0   0:00.00 scsi_eh_2          
  340 root      20   0     0    0    0 S    0  0.0   0:00.00 scsi_eh_3          
  341 root      20   0     0    0    0 S    0  0.0   0:00.00 scsi_eh_4          
  342 root      20   0     0    0    0 S    0  0.0   0:00.00 scsi_eh_5          
  356 root      20   0     0    0    0 S    0  0.0   1076:50 flush-104:0        
  361 root      20   0     0    0    0 S    0  0.0   0:00.00 usbhid_resumer     
  389 root      20   0     0    0    0 S    0  0.0 176:39.21 jbd2/cciss!c0d0    
  390 root      20   0     0    0    0 S    0  0.0   0:00.00 ext4-dio-unwrit    
  391 root      20   0     0    0    0 S    0  0.0   0:00.00 ext4-dio-unwrit    
  392 root      20   0     0    0    0 S    0  0.0   0:00.00 ext4-dio-unwrit    
  393 root      20   0     0    0    0 S    0  0.0   0:00.00 ext4-dio-unwrit    
  394 root      20   0     0    0    0 S    0  0.0   0:00.00 ext4-dio-unwrit    
  395 root      20   0     0    0    0 S    0  0.0   0:00.00 ext4-dio-unwrit    
  396 root      20   0     0    0    0 S    0  0.0   0:00.00 ext4-dio-unwrit    
  397 root      20   0     0    0    0 S    0  0.0   0:00.00 ext4-dio-unwrit    
  443 root      16  -4 16840  484  384 S    0  0.0   0:00.04 udevd              
  607 root      18  -2 16872  552  348 S    0  0.0   0:00.00 udevd              
  610 root      18  -2 16872  556  344 S    0  0.0   0:00.00 udevd              
  914 root      20   0     0    0    0 S    0  0.0   0:05.36 jbd2/cciss!c0d0    
  915 root      20   0     0    0    0 S    0  0.0   0:00.00 ext4-dio-unwrit    
  916 root      20   0     0    0    0 S    0  0.0   0:00.00 ext4-dio-unwrit    
  917 root      20   0     0    0    0 S    0  0.0   0:00.00 ext4-dio-unwrit    
  918 root      20   0     0    0    0 S    0  0.0   0:00.00 ext4-dio-unwrit    
  919 root      20   0     0    0    0 S    0  0.0   0:00.00 ext4-dio-unwrit    
  920 root      20   0     0    0    0 S    0  0.0   0:00.00 ext4-dio-unwrit    
  921 root      20   0     0    0    0 S    0  0.0   0:00.00 ext4-dio-unwrit    
  922 root      20   0     0    0    0 S    0  0.0   0:00.00 ext4-dio-unwrit    
 1022 daemon    20   0  8096  360  356 S    0  0.0   0:00.00 portmap            
 1034 statd     20   0 14384  564  560 S    0  0.0   0:00.00 rpc.statd          
 1195 root      20   0  117m 1428  948 S    0  0.0  11:32.15 rsyslogd           
 1238 daemon    20   0 18716  272  260 S    0  0.0   0:00.04 atd                
 1272 root      20   0  3920  436  432 S    0  0.0   0:00.00 ACPid              
 1301 messageb  20   0 23268  248  244 S    0  0.0   0:00.00 dbus-daemon        
 1317 root      20   0 49176  640  520 S    0  0.0   0:00.00 sshd               
 2437 root      20   0 22428  776  676 S    0  0.0   0:12.10 cron               
 2485 root      20   0  332m 3436  820 S    0  0.0  45:42.71 sw-collectd        
 2493 root      20   0  233m  17m 2428 S    0  0.1   8:31.73 sw-engine          
 2675 root      20   0  5932  452  448 S    0  0.0   0:00.00 getty              
 2676 root      20   0  5932  452  448 S    0  0.0   0:00.00 getty              
 2677 root      20   0  5932  452  448 S    0  0.0   0:00.00 getty              
 2678 root      20   0  5932  452  448 S    0  0.0   0:00.00 getty              
 2679 root      20   0  5932  452  448 S    0  0.0   0:00.00 getty              
 2680 root      20   0  5932  452  448 S    0  0.0   0:00.00 getty              
 6009 sw-cp-se  20   0 47844 4236 1832 S    0  0.0   0:11.87 sw-cp-serverd      
 8129 root      20   0 19336  724  640 S    0  0.0   0:00.02 xinetd             
 9100 bind      20   0  249m  13m 1480 S    0  0.0   0:01.46 named              
10028 root       0 -20     0    0    0 S    0  0.0 130:30.37 hcp_watchdog       
10029 root      25   5  363m  32m 1112 S    0  0.1 545:26.72 cdp-2-6            
10906 qmails    20   0  535m  600  428 S    0  0.0   4:52.69 qmail-send         
10908 qmaill    20   0  3868  532  428 S    0  0.0   1:12.26 splogger           
10909 root      20   0  3908  388  296 S    0  0.0   0:24.19 qmail-lspawn       
10910 qmailr    20   0 1725m  468  320 S    0  0.0   1:07.91 qmail-rspawn       
10911 qmailq    20   0  3864  372  312 S    0  0.0   0:44.72 qmail-clean        
23411 root      20   0  114m  49m 2304 S    0  0.2   0:07.00 spamd              
23412 popuser   20   0  114m  48m  960 S    0  0.2   0:00.03 spamd              
23413 popuser   20   0  114m  48m  960 S    0  0.2   0:00.03 spamd              
23818 root      20   0 30928 1208  276 S    0  0.0   0:00.00 nginx              
24097 root      20   0  274m  20m   9m S    0  0.1   0:01.27 apache2            
24099 www-data  20   0  166m 5664  480 S    0  0.0   0:00.29 apache2            
26270 root      20   0  3956  632  508 S    0  0.0   0:00.00 mysqld_safe        
26382 root      20   0  5348  664  556 S    0  0.0   0:00.00 logger             
30920 www-data  20   0  311m  48m 6528 S    0  0.2   0:26.49 apache2            
31233 www-data  20   0  302m  40m 5956 S    0  0.1   0:24.78 apache2            
31235 www-data  20   0  302m  40m 6144 S    0  0.1   0:29.78 apache2            
31236 www-data  20   0  300m  37m 6024 S    0  0.1   0:29.20 apache2            
31238 www-data  20   0  285m  24m 6176 S    0  0.1   0:27.13 apache2            
31428 www-data  20   0  298m  36m 5796 S    0  0.1   0:14.62 apache2            
31429 www-data  20   0  291m  30m 5888 S    0  0.1   0:14.11 apache2            
31432 www-data  20   0  294m  32m 5976 S    0  0.1   0:13.81 apache2            
31434 www-data  20   0  296m  35m 4996 S    0  0.1   0:14.21 apache2            
31664 www-data  20   0  3956  588  492 S    0  0.0   0:00.00 sh                 
31665 www-data  20   0 19068 1308  920 R    0  0.0   0:00.00 top                

I really have not much idea about any of that

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Do you have SSH access to your server? if yes, run: cat /etc/my.cnf

If it gives an error, its because my.cnf is on another location, but normally is that one.

 

At this moment you have almost 11Gb free, but 17Gb are cached files from the OS. So in reality you have 28Gb free memory. 

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