Hello,
my server has continuous peaks in real memory (I have 4GB ram) and virtual memory (1.94 GB), and I mean almost every time I load a page! The websites were faster when I was on a shared host, I’m really going crazy!
I installed atop to see what was causing the server load, and this is the result of the command atop -r (I removed the end tail with all the processes that wheren’t taking any cpu nor memory load):
ATOP - mail 2014/04/14 10:51:58 --------- 10m0s elapsed
PRC | sys 2m05s | user 7m53s | #proc 172 | #zombie 0 | #exit 231 |
CPU | sys 20% | user 65% | irq 0% | idle 14% | wait 1% |
CPL | avg1 46.10 | avg5 23.70 | avg15 14.49 | csw 555283 | intr 538460 |
MEM | tot 3.7G | free 265.4M | cache 200.8M | buff 1.4M | slab 64.2M |
SWP | tot 1.9G | free 1.6G | | vmcom 6.4G | vmlim 3.8G |
PAG | scan 290944 | steal 187743 | stall 3406 | swin 5936 | swout 73014 |
LVM | roup-lv_root | busy 5% | read 14088 | write 8225 | avio 1.46 ms |
LVM | roup-lv_swap | busy 2% | read 5936 | write 73014 | avio 0.13 ms |
DSK | sda | busy 7% | read 13624 | write 3368 | avio 2.32 ms |
NET | transport | tcpi 6934 | tcpo 5793 | udpi 33 | udpo 33 |
NET | network | ipi 7353 | ipo 5920 | ipfrw 0 | deliv 6967 |
NET | eth0 0% | pcki 7305 | pcko 7716 | si 12 Kbps | so 112 Kbps |
NET | lo ---- | pcki 615 | pcko 615 | si 0 Kbps | so 0 Kbps |
PID SYSCPU USRCPU VGROW RGROW RDDSK WRDSK ST EXC S CPU CMD
15633 1m50s 2m55s 2.4G 658.4M 142.2M 142.7M – - S 47% mysqld
15040 1.12s 35.35s 0K 0K - - NE 0 E 6%
15615 0.84s 29.38s 0K 0K - - NE 0 E 5%
15616 0.90s 29.21s 0K 0K - - NE 0 E 5%
15591 0.18s 6.47s 0K 0K - - -E 0 E 1%
16835 0.39s 5.91s 0K 0K - - NE 0 E 1%
15356 0.15s 5.26s 0K 0K - - -E 0 E 1%
15280 0.12s 4.92s 0K 0K - - -E 0 E 1%
16911 0.32s 4.57s 1.0G 203.6M 668K 4K N- - S 1% httpd
16910 0.21s 4.43s 944.8M 173.1M 388K 0K N- - S 1% httpd
15262 0.09s 4.55s 0K 0K - - -E 0 E 1%
16833 0.26s 4.35s 0K 0K - - NE 0 E 1%
16837 0.17s 4.00s 0K 0K - - NE 0 E 1%
15271 0.12s 4.04s 0K 0K - - -E 0 E 1%
15285 0.07s 3.99s 0K 0K - - -E 0 E 1%
16907 0.26s 3.78s 852.1M 58520K 1212K 8K N- - S 1% httpd
15273 0.10s 3.91s 0K 0K - - -E 0 E 1%
15272 0.10s 3.76s 0K 0K - - -E 0 E 1%
16832 0.36s 3.49s 0K 0K - - NE 0 E 1%
15380 0.08s 3.66s 0K 0K - - -E 0 E 1%
16834 0.24s 3.48s 0K 0K - - NE 0 E 1%
14618 0.10s 3.49s 0K 0K - - -E 0 E 1%
16914 0.09s 3.48s 825.0M 60692K 120K 192K N- - S 1% httpd
15277 0.14s 3.27s 0K 0K - - -E 0 E 1%
16922 0.09s 3.30s 824.4M 62512K 68K 12K N- - S 1% httpd
15593 0.09s 3.27s 0K 0K - - -E 0 E 1%
15432 0.09s 3.07s 0K 0K - - -E 0 E 1%
16855 0.09s 3.01s 0K 0K - - NE 0 E 1%
16861 0.07s 2.81s 0K 0K - - NE 0 E 0%
16927 0.09s 2.71s 826.3M 65132K 456K 124K N- - R 0% httpd
16860 0.08s 2.63s 0K 0K - - NE 0 E 0%
15507 0.08s 2.55s 0K 0K - - -E 0 E 0%
15424 0.06s 2.52s 0K 0K - - -E 0 E 0%
16940 0.08s 2.47s 826.7M 65492K 0K 4K N- - S 0% httpd
16912 0.11s 2.43s 832.4M 67508K 160K 0K N- - S 0% httpd
16937 0.10s 2.43s 827.3M 63572K 364K 4K N- - S 0% httpd
15260 0.07s 2.41s 0K 0K - - -E 0 E 0%
16858 0.13s 2.31s 0K 0K - - NE 0 E 0%
16839 0.10s 2.33s 0K 0K - - NE 0 E 0%
16854 0.09s 2.21s 0K 0K - - NE 0 E 0%
16928 0.10s 2.15s 833.2M 75508K 132K 0K N- - S 0% httpd
16849 0.10s 1.90s 0K 0K - - NE 0 E 0%
16926 0.09s 1.89s 831.4M 72836K 128K 0K N- - S 0% httpd
16840 0.07s 1.87s 0K 0K - - NE 0 E 0%
16842 0.11s 1.80s 0K 0K - - NE 0 E 0%
16936 0.09s 1.80s 831.2M 72528K 232K 4K N- - S 0% httpd
16919 0.11s 1.72s 825.0M 64140K 168K 72K N- - S 0% httpd
16934 0.09s 1.72s 830.9M 71904K 320K 0K N- - S 0% httpd
16836 0.08s 1.70s 0K 0K - - NE 0 E 0%
16925 0.05s 1.66s 827.2M 66752K 32K 12K N- - S 0% httpd
16913 0.07s 1.60s 829.2M 66484K 308K 4K N- - S 0% httpd
16939 0.08s 1.56s 830.4M 70904K 288K 0K N- - S 0% httpd
16859 0.07s 1.53s 0K 0K - - NE 0 E 0%
16921 0.09s 1.50s 826.4M 67324K 20K 84K N- - S 0% httpd
16924 0.08s 1.50s 826.4M 66224K 16K 12K N- - S 0% httpd
16841 0.08s 1.50s 0K 0K - - NE 0 E 0%
15287 0.05s 1.50s 0K 0K - - -E 0 E 0%
16844 0.10s 1.32s 0K 0K - - NE 0 E 0% <miniserv.pl>
16920 0.06s 1.27s 826.2M 64336K 60K 80K N- - S 0% httpd
16929 0.08s 1.20s 831.7M 71104K 0K 0K N- - S 0% httpd
16909 0.07s 1.21s 826.4M 52852K 68K 92K N- - S 0% httpd
16974 0.10s 1.17s 825.0M 75576K 68K 80K N- - S 0% httpd
16999 0.08s 1.18s 824.4M 71132K 136K 4K N- - S 0% httpd
16938 0.07s 1.12s 825.9M 64984K 96K 0K N- - S 0% httpd
17090 0.07s 1.10s 826.2M 64128K 364K 4K N- - S 0% httpd
16970 0.06s 1.08s 826.0M 64008K 224K 0K N- - S 0% httpd
16985 0.04s 1.10s 825.2M 63028K 0K 0K N- - S 0% httpd
17080 0.05s 1.08s 826.2M 64420K 64K 4K N- - S 0% httpd
17001 0.07s 1.05s 827.2M 64008K 7276K 8K N- - S 0% httpd
16843 0.07s 1.05s 0K 0K - - NE 0 E 0%
17007 0.04s 1.05s 826.7M 64772K 436K 4K N- - S 0% httpd
17019 0.06s 0.99s 826.7M 64736K 100K 4K N- - S 0% httpd
16845 0.08s 0.95s 0K 0K - - NE 0 E 0% <miniserv.pl>
17004 0.11s 0.90s 835.7M 84168K 108K 8K N- - S 0% httpd
As far as I can see there’s one big process with mysql happening at the beginning:
15633 1m50s 2m55s 2.4G 658.4M 142.2M 142.7M – - S 47% mysqld
When I went to check MySQL Database Server, it was down and then restarted by itself. So I went to see all executing processes, filtered then by memory usage and the first one was that big mysqld process occupying more than 3 GB of memory! When I opened it up, this was the command:
/usr/libexec/mysqld --basedir=/usr --datadir=/var/lib/mysql --user=mysql --log-error=/var/log/mysqld.log --pid-file=/var/run/mysqld/mysqld.pid --socket=/var/lib/mysql/mysql.sock
I only have one big MySQL database of 340 MB and I really don’t understand how it could occupy 3GB of ram everytime a page is loaded.
Could you please help me nailing down to the problem? Search engines are not indexing my pages becuase they’re all timing out, it’s 4 days fulltime that I’m trying to resolve this, it’s becoming a nightmare!
Please help, Thanks again