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POWho are using all the memory on my production server(apache + mysql + rails)?
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copied!<p>I am running a EC2 small instance as my production server. It has 1.7G memory. I noticed it uses almost all memory. However when I check top output, it looks like that only 30% is actually used. Did I misread the top output?</p> <p>Here is the top output (sorted by %MEM)</p> <pre> top - 21:33:15 up 141 days, 9:39, 2 users, load average: 0.00, 0.00, 0.00 Tasks: 81 total, 2 running, 79 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: 1747660k total, 1733580k used, 14080k free, 224144k buffers Swap: 917496k total, 132k used, 917364k free, 1144808k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 11664 mysql 15 0 794m 83m 5020 S 0.0 4.9 0:17.34 mysqld 12845 nobody 25 0 52416 38m 3200 S 0.0 2.3 0:02.10 ruby1.8 12847 nobody 16 0 52704 38m 2068 S 0.0 2.2 0:02.08 ruby1.8 12023 www-data 15 0 37692 10m 4164 S 0.0 0.6 0:01.28 apache2 11979 www-data 15 0 37660 10m 4172 S 0.0 0.6 0:01.24 apache2 12020 www-data 15 0 37708 10m 4120 S 0.0 0.6 0:01.17 apache2 12263 www-data 15 0 37708 10m 4176 S 0.0 0.6 0:00.83 apache2 11989 www-data 15 0 37720 10m 4024 S 0.0 0.6 0:01.28 apache2 12014 www-data 15 0 37468 10m 4172 S 0.0 0.6 0:01.17 apache2 12021 www-data 15 0 37652 10m 3992 S 0.0 0.6 0:01.25 apache2 12054 www-data 15 0 37480 10m 4176 S 0.0 0.6 0:01.33 apache2 11990 www-data 15 0 37448 10m 4188 S 0.0 0.6 0:01.16 apache2 12024 www-data 16 0 37416 10m 4172 S 0.0 0.6 0:01.00 apache2 11991 www-data 15 0 37432 10m 4148 S 0.0 0.6 0:01.24 apache2 11984 www-data 15 0 37444 9.8m 3972 S 0.0 0.6 0:01.33 apache2 11985 www-data 15 0 37444 9.8m 3948 S 0.0 0.6 0:01.18 apache2 11982 www-data 15 0 37408 9.8m 3968 S 0.0 0.6 0:01.12 apache2 12013 www-data 17 0 37432 9.8m 4152 S 0.0 0.6 0:01.19 apache2 12052 www-data 15 0 37176 9.8m 4180 S 0.0 0.6 0:01.29 apache2 11981 www-data 15 0 37172 9.8m 4168 S 0.0 0.6 0:01.40 apache2 12395 www-data 15 0 37420 9988 3972 S 0.0 0.6 0:00.72 apache2 12015 www-data 15 0 37412 9972 3900 S 0.0 0.6 0:01.31 apache2 11987 www-data 15 0 37160 9956 4136 S 0.0 0.6 0:01.22 apache2 12022 www-data 15 0 37140 9900 4140 S 0.0 0.6 0:01.20 apache2 12051 www-data 15 0 37216 9848 3976 S 0.0 0.6 0:01.31 apache2 11978 www-data 18 0 36948 9784 4180 S 0.0 0.6 0:01.08 apache2 11975 www-data 15 0 37140 9772 3972 S 0.0 0.6 0:01.49 apache2 12019 www-data 15 0 37148 9752 3944 S 0.0 0.6 0:01.08 apache2 11970 www-data 15 0 36920 9736 4160 S 0.0 0.6 0:01.25 apache2 11974 www-data 15 0 36848 9656 4148 S 0.0 0.6 0:01.53 apache2 11973 www-data 15 0 36924 9552 3972 S 0.0 0.5 0:01.19 apache2 28622 root 18 0 35232 9232 5592 S 0.0 0.5 0:00.30 apache2 11969 www-data 15 0 36340 9132 4136 S 0.0 0.5 0:01.51 apache2 12018 www-data 19 0 36332 9124 4136 S 0.0 0.5 0:01.32 apache2 11972 www-data 15 0 36320 8968 3988 S 0.0 0.5 0:01.33 apache2 12012 www-data 15 0 35796 8600 4144 S 0.0 0.5 0:01.11 apache2 11965 root 15 0 17356 7552 1644 S 0.0 0.4 0:00.13 ruby1.8 12848 root 15 0 8384 2744 2164 R 0.0 0.2 0:00.12 sshd 12762 root 15 0 8384 2724 2164 S 0.0 0.2 0:00.01 sshd 11302 postfix 18 0 6184 2576 1880 S 0.0 0.1 0:00.02 tlsmgr 11964 root 16 0 8188 2248 1492 S 0.0 0.1 0:00.06 ApplicationPool 23997 postfix 22 0 5856 1852 1488 S 0.0 0.1 0:00.22 qmgr 12850 root 15 0 4408 1848 1436 S 0.0 0.1 0:00.00 bash 12764 root 25 0 4396 1800 1400 S 0.0 0.1 0:00.00 bash 23996 root 15 0 5804 1780 1428 S 0.0 0.1 0:01.01 master 13036 postfix 17 0 5812 1684 1356 S 0.0 0.1 0:00.00 pickup 1051 klog 18 0 2884 1676 436 S 0.0 0.1 0:00.04 klogd 13035 root 15 0 2468 1164 916 R 0.0 0.1 0:00.01 top 5841 nobody 15 0 2652 1120 684 S 0.0 0.1 0:00.50 memcached 11509 root 15 0 5456 1068 676 S 0.0 0.1 0:00.00 sshd 1163 root 18 0 3560 1060 872 S 0.0 0.1 0:01.46 cron 1 root 18 0 2032 840 580 S 0.0 0.0 0:04.20 init 4070 syslog 18 0 2056 732 568 S 0.0 0.0 7:25.48 syslogd 908 root 16 -2 2292 656 528 S 0.0 0.0 0:00.06 dhclient3 </pre>

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