Приветствую.
По системному ПО ничего не менялось, только РНР-код сайта.
В ТОР-е есть необычно толстые процессы php-fpm. Конфиг на всяк случай в аттаче, но там ничего необычного.
last pid: 40854; load averages: 0.58, 0.62, 0.56 up 2+04:04:40 19:08:59
158 processes: 1 running, 157 sleeping
CPU: 53.2% user, 0.0% nice, 3.9% system, 0.2% interrupt, 42.7% idle
Mem: 2699M Active, 319M Inact, 475M Wired, 78M Cache, 214M Buf, 359M Free
Swap: 2048M Total, 128M Used, 1920M Free, 6% Inuse
PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND
34046 www 1 4 0 249M 148M accept 1 2:09 0.00% php-cgi
32936 www 1 4 0 249M 148M accept 1 2:22 0.39% php-cgi
34115 www 1 4 0 249M 148M accept 0 2:18 0.00% php-cgi
30121 www 1 4 0 249M 148M accept 0 3:16 0.00% php-cgi
32860 www 1 4 0 249M 147M accept 1 2:29 0.00% php-cgi
32879 www 1 4 0 249M 147M accept 1 2:53 0.00% php-cgi
32920 www 1 4 0 249M 147M accept 0 2:36 0.20% php-cgi
32953 www 1 4 0 249M 147M accept 0 2:33 0.00% php-cgi
32918 www 1 4 0 249M 147M accept 0 2:11 0.39% php-cgi
32867 www 1 4 0 249M 147M accept 0 2:18 0.29% php-cgi
32906 www 1 4 0 249M 147M accept 0 2:57 0.98% php-cgi
29615 www 1 4 0 249M 147M accept 0 3:01 0.59% php-cgi
25789 www 1 4 0 250M 147M accept 0 4:39 0.00% php-cgi
32863 www 1 4 0 249M 147M accept 0 2:27 0.00% php-cgi
32923 www 1 4 0 249M 147M accept 1 2:36 0.00% php-cgi
32894 www 1 4 0 249M 147M accept 0 2:23 0.98% php-cgi
32854 www 1 4 0 248M 147M accept 0 2:47 0.00% php-cgi
32865 www 1 4 0 249M 147M accept 0 2:12 0.00% php-cgi
32909 www 1 4 0 248M 146M accept 0 2:33 0.68% php-cgi
32893 www 1 4 0 248M 146M accept 1 2:12 0.00% php-cgi
36374 www 1 4 0 248M 146M accept 1 1:31 1.66% php-cgi
34476 www 1 4 0 127M 27292K accept 1 2:48 0.00% php-cgi
35074 www 1 4 0 127M 26492K accept 1 2:05 0.00% php-cgi
32932 www 1 4 0 128M 26416K accept 0 2:10 0.00% php-cgi
32983 www 1 4 0 128M 26392K accept 0 2:36 0.00% php-cgi
32948 www 1 4 0 127M 26364K accept 1 2:31 0.00% php-cgi
32930 www 1 4 0 128M 26332K accept 1 2:18 0.00% php-cgi
35479 www 1 4 0 127M 26320K accept 1 1:42 0.20% php-cgi
37812 www 1 4 0 127M 26296K accept 0 1:13 1.46% php-cgi
32968 www 1 4 0 127M 26296K accept 0 2:31 0.78% php-cgi
32957 www 1 4 0 128M 26252K accept 0 2:27 0.88% php-cgi
32843 www 1 4 0 128M 26228K accept 0 2:47 0.68% php-cgi
35981 www 1 4 0 127M 26212K accept 0 1:34 0.10% php-cgi
32887 www 1 4 0 127M 26180K accept 0 2:43 0.00% php-cgi
34245 www 1 4 0 127M 26100K accept 0 2:21 0.59% php-cgi
34381 www 1 4 0 127M 26080K accept 0 2:13 0.29% php-cgi
32862 www 1 4 0 127M 26000K accept 0 2:19 0.49% php-cgi
38236 www 1 4 0 127M 25940K accept 0 0:57 0.00% php-cgi
32951 www 1 4 0 127M 25840K accept 1 2:32 0.29% php-cgi
32864 www 1 4 0 127M 25824K accept 0 2:35 0.00% php-cgi
32955 www 1 4 0 127M 25812K accept 1 2:37 0.29% php-cgi
33857 www 1 4 0 127M 25804K accept 1 2:02 0.00% php-cgi
32892 www 1 4 0 127M 25800K accept 0 2:24 0.10% php-cgi
33836 www 1 4 0 127M 25792K accept 1 2:14 0.20% php-cgi
32877 www 1 4 0 127M 25748K accept 0 2:28 0.00% php-cgi
32928 www 1 4 0 127M 25708K accept 0 2:20 0.78% php-cgi
32949 www 1 4 0 127M 25672K accept 0 2:32 0.00% php-cgi
34114 www 1 4 0 127M 25636K accept 1 2:16 0.00% php-cgi
32935 www 1 4 0 127M 25620K accept 0 2:32 0.10% php-cgi
32984 www 1 4 0 127M 25604K accept 1 2:16 0.00% php-cgi
38553 www 1 4 0 127M 25544K accept 1 0:54 0.49% php-cgi
34041 www 1 4 0 126M 25540K accept 1 2:11 0.00% php-cgi
32985 www 1 4 0 127M 25536K accept 0 2:30 0.00% php-cgi
32868 www 1 4 0 127M 25528K accept 0 2:25 0.78% php-cgi
###########################
# php -m
[PHP Modules]
curl
date
dom
eAccelerator
exif
fileinfo
ftp
gd
iconv
json
libxml
mbstring
memcache
mysql
pcre
posix
Reflection
session
SimpleXML
sockets
SPL
standard
uploadprogress
xml
xmlreader
xmlrpc
xmlwriter
xsl
[Zend Modules]
eAccelerator
##########################
# pecl list
=========================================
Package Version State
memcache 2.2.5 stable
uploadprogress 0.9.2 beta
--

Think before you print.
Best regards, Alexey Bobok.