If I have this output from top for httpd, how do I determine its total memory usage?
16924 apache 20 0 203m 7108 2852 S 0.0 0.2 0:03.48 httpd
16925 apache 20 0 204m 7128 2776 S 0.0 0.2 0:03.40 httpd
16926 apache 20 0 203m 7024 2772 S 0.0 0.2 0:03.24 httpd
16928 apache 20 0 203m 7164 2852 S 0.3 0.2 0:03.64 httpd
16929 apache 20 0 203m 7028 2740 S 0.0 0.2 0:03.37 httpd
16930 apache 20 0 203m 6828 2740 S 0.0 0.2 0:03.21 httpd
16931 apache 20 0 203m 6916 2728 S 0.0 0.2 0:03.55 httpd
16941 apache 20 0 204m 7076 2740 S 0.0 0.2 0:03.39 httpd
16995 apache 20 0 203m 6852 2716 S 0.0 0.2 0:03.46 httpd
17086 apache 20 0 203m 6988 2716 S 0.0 0.2 0:03.73 httpd
17103 apache 20 0 203m 7028 2740 S 0.0 0.2 0:03.46 httpd
17194 apache 20 0 204m 7276 2852 S 0.0 0.2 0:03.17 httpd
17288 apache 20 0 204m 7176 2840 S 0.0 0.2 0:03.03 httpd
18432 apache 20 0 203m 6980 2740 S 0.0 0.2 0:02.31 httpd
18659 apache 20 0 203m 6972 2816 S 0.0 0.2 0:01.87 httpd
19432 root 20 0 203m 7784 4356 S 0.0 0.2 2:53.45 httpd
19686 apache 20 0 203m 6916 2728 S 0.0 0.2 0:01.67 httpd
19698 apache 20 0 203m 7048 2840 S 0.0 0.2 0:01.78 httpd
19699 apache 20 0 203m 6904 2740 S 0.0 0.2 0:01.93 httpd
19700 apache 20 0 203m 7124 2860 S 0.0 0.2 0:02.00 httpd
19710 apache 20 0 203m 6736 2740 S 0.3 0.2 0:01.96 httpd
According to my NewRelic monitoring, it's using just over 600MB at the above point in time.
You don't, from
top. Its memory accounting is incomplete, at best (theSWAPcolumn is totally whack). Use smem to provide you with more appropriate memory statistics.