RAM used

[sarah]

Hi! I've a Virtual Server with 10 sites activated. It seems strange that I've 95% for memory used. I tried to execute top command and this is what I see.... can you help me to make better performance?


top - 21:56:10 up 31 days, 16:55, 1 user, load average: 0.00, 0.00, 0.00
Tasks: 115 total, 1 running, 114 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 4061760k total, 3169432k used, 892328k free, 262844k buffers
Swap: 4290552k total, 0k used, 4290552k free, 2212784k cached

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1131 mysql 20 0 242m 60m 8396 S 0 1.5 7:49.96 mysqld
978 vu2015 20 0 191m 41m 3996 S 0 1.1 0:07.26 php5-cgi
979 vu2015 20 0 188m 39m 3980 S 0 1.0 0:06.80 php5-cgi
1099 vu2008 20 0 180m 31m 4268 S 0 0.8 0:00.89 php5-cgi
1420 vu2027 20 0 175m 26m 4180 S 0 0.7 0:00.86 php5-cgi
1419 vu2027 20 0 173m 25m 3200 S 0 0.6 0:00.85 php5-cgi
1433 vu2010 20 0 173m 24m 4188 S 0 0.6 0:00.13 php5-cgi
1434 vu2010 20 0 171m 23m 3308 S 0 0.6 0:00.13 php5-cgi
5129 bind 20 0 198m 23m 2480 S 0 0.6 0:08.04 named
1098 vu2008 20 0 170m 22m 3272 S 0 0.6 0:00.69 php5-cgi
18180 vu2000 20 0 171m 21m 4152 S 0 0.6 0:05.20 php5-cgi
14833 vu2009 20 0 170m 20m 3972 S 0 0.5 0:18.83 php5-cgi
18179 vu2000 20 0 171m 20m 4316 S 0 0.5 0:04.44 php5-cgi
31715 vu2012 20 0 167m 19m 3376 S 0 0.5 0:02.66 php5-cgi
31714 vu2012 20 0 167m 19m 3268 S 0 0.5 0:02.57 php5-cgi
14832 vu2009 20 0 166m 18m 3376 S 0 0.5 0:19.70 php5-cgi
17760 vu2011 20 0 166m 18m 3184 S 0 0.5 0:01.62 php5-cgi
17761 vu2011 20 0 165m 17m 3184 S 0 0.5 0:01.12 php5-cgi
18177 vu2000 20 0 159m 13m 5712 S 0 0.3 0:00.01 php5-cgi
1106 postgrey 20 0 58256 12m 2792 S 0 0.3 0:00.07 postgrey
1104 polw 20 0 54556 12m 1296 S 0 0.3 0:00.00 perl
1112 polw 20 0 54556 12m 984 S 0 0.3 0:04.28 perl
14559 www-data 20 0 312m 11m 1844 S 0 0.3 0:01.86 apache2
14560 www-data 20 0 311m 11m 1824 S 0 0.3 0:01.80 apache2
1431 vu2010 20 0 154m 9168 5704 S 0 0.2 0:00.01 php5-cgi
31712 vu2012 20 0 154m 9164 5704 S 0 0.2 0:00.00 php5-cgi
1096 vu2008 20 0 154m 9160 5704 S 0 0.2 0:00.00 php5-cgi


Thanks