{"id":6,"date":"2009-03-09T13:46:17","date_gmt":"2009-03-09T20:46:17","guid":{"rendered":"http:\/\/www.vadapt.com\/?p=6"},"modified":"2011-08-15T11:58:19","modified_gmt":"2011-08-15T18:58:19","slug":"overhead-memory-table-on-esx-virtual-machines","status":"publish","type":"post","link":"http:\/\/iben.users.sonic.net\/wp\/overhead-memory-table-on-esx-virtual-machines\/","title":{"rendered":"Overhead Memory Table on ESX Virtual Machines"},"content":{"rendered":"

Refer to page 30 of http:\/\/www.vmware.com\/pdf\/vsphere4\/r40\/vsp_40_resource_mgmt.pdf or page 136 of http:\/\/www.vmware.com\/pdf\/vi3_35\/esx_3\/r35\/vi3_35_25_resource_mgmt.pdf<\/p>\n

\"Memory<\/a>

Memory overhead usage chart<\/p><\/div>\n

Some examples:<\/p>\n

With 1 vcpu and 256MB of RAM; the VM kernel requires 87MB for 32 bit VM\u2019s and 108MB for 64 bit VM\u2019s.<\/p>\n

With 8GM of RAM and 1 vCPU you\u2019ll need 188MB and 209MB for 32 and 64 bit.<\/p>\n

With 4 vCPU\u2019s and 8GB of RAM you\u2019re looking at ~360MB for a 32 bit VM and 431MB for a 64 bit VM.<\/p>\n

Note: memory overhead for 32-bit VMs generally increased between 3.0.1 and 3.5 while 64-bit overhead generally decreased.<\/code><\/p>\n

ESX 3.5 Overhead<\/strong><\/p>\n<\/p>\n\n\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
ESX
\n3.5 Update 2<\/td>\n<\/tr>\n
Virtual CPUs<\/td>\nVirtual Memory (MB)<\/td>\nOverhead for 32-bit VM
\n(MB)<\/td>\n		% Overhead for 32-bit VM<\/td>\nOverhead for 64-bit VM
\n(MB)<\/td>\n		% Overhead for 64-bit VM<\/td>\n<\/tr>\n
1<\/td>\n256<\/td>\n87.56<\/td>\n34.20%<\/td>\n107.54<\/td>\n42.01%<\/td>\n<\/tr>\n
1<\/td>\n512<\/td>\n90.82<\/td>\n17.74%<\/td>\n110.81<\/td>\n21.64%<\/td>\n<\/tr>\n
1<\/td>\n1,024<\/td>\n97.35<\/td>\n9.51%<\/td>\n117.35<\/td>\n11.46%<\/td>\n<\/tr>\n
1<\/td>\n2,048<\/td>\n110.40<\/td>\n5.39%<\/td>\n130.42<\/td>\n6.37%<\/td>\n<\/tr>\n
1<\/td>\n4,096<\/td>\n136.50<\/td>\n3.33%<\/td>\n156.57<\/td>\n3.82%<\/td>\n<\/tr>\n
1<\/td>\n8,192<\/td>\n188.69<\/td>\n2.30%<\/td>\n208.85<\/td>\n2.55%<\/td>\n<\/tr>\n
1<\/td>\n16,384<\/td>\n293.07<\/td>\n1.79%<\/td>\n313.42<\/td>\n1.91%<\/td>\n<\/tr>\n
1<\/td>\n32,768<\/td>\n501.84<\/td>\n1.53%<\/td>\n522.56<\/td>\n1.59%<\/td>\n<\/tr>\n
1<\/td>\n65,536<\/td>\n919.37<\/td>\n1.40%<\/td>\n940.84<\/td>\n1.44%<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
2<\/td>\n256<\/td>\n108.73<\/td>\n42.47%<\/td>\n146.41<\/td>\n57.19%<\/td>\n<\/tr>\n
2<\/td>\n512<\/td>\n114.49<\/td>\n22.36%<\/td>\n152.20<\/td>\n29.73%<\/td>\n<\/tr>\n
2<\/td>\n1,024<\/td>\n126.04<\/td>\n12.31%<\/td>\n163.79<\/td>\n16.00%<\/td>\n<\/tr>\n
2<\/td>\n2,048<\/td>\n149.11<\/td>\n7.28%<\/td>\n186.96<\/td>\n9.13%<\/td>\n<\/tr>\n
2<\/td>\n4,096<\/td>\n195.27<\/td>\n4.77%<\/td>\n233.30<\/td>\n5.70%<\/td>\n<\/tr>\n
2<\/td>\n8,192<\/td>\n287.57<\/td>\n3.51%<\/td>\n325.98<\/td>\n3.98%<\/td>\n<\/tr>\n
2<\/td>\n16,384<\/td>\n472.18<\/td>\n2.88%<\/td>\n511.34<\/td>\n3.12%<\/td>\n<\/tr>\n
2<\/td>\n32,768<\/td>\n841.40<\/td>\n2.57%<\/td>\n882.06<\/td>\n2.69%<\/td>\n<\/tr>\n
2<\/td>\n65,536<\/td>\n1579.84<\/td>\n2.41%<\/td>\n1623.50<\/td>\n2.48%<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
4<\/td>\n256<\/td>\n146.75<\/td>\n57.32%<\/td>\n219.82<\/td>\n85.87%<\/td>\n<\/tr>\n
4<\/td>\n512<\/td>\n153.52<\/td>\n29.98%<\/td>\n226.64<\/td>\n44.27%<\/td>\n<\/tr>\n
4<\/td>\n1,024<\/td>\n167.09<\/td>\n16.32%<\/td>\n240.30<\/td>\n23.47%<\/td>\n<\/tr>\n
4<\/td>\n2,048<\/td>\n194.20<\/td>\n9.48%<\/td>\n267.61<\/td>\n13.07%<\/td>\n<\/tr>\n
4<\/td>\n4,096<\/td>\n248.45<\/td>\n6.07%<\/td>\n322.22<\/td>\n7.87%<\/td>\n<\/tr>\n
4<\/td>\n8,192<\/td>\n356.91<\/td>\n4.36%<\/td>\n431.44<\/td>\n5.27%<\/td>\n<\/tr>\n
4<\/td>\n16,384<\/td>\n573.85<\/td>\n3.50%<\/td>\n649.88<\/td>\n3.97%<\/td>\n<\/tr>\n
4<\/td>\n32,768<\/td>\n1007.73<\/td>\n3.08%<\/td>\n1086.75<\/td>\n3.32%<\/td>\n<\/tr>\n
4<\/td>\n65,536<\/td>\n1875.48<\/td>\n2.86%<\/td>\n1960.52<\/td>\n2.99%<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\nAverages<\/td>\n408.30<\/td>\n11.51%<\/td>\n453.30<\/td>\n15.29%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

ESX 3.0 Overhead<\/strong><\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
vcpu<\/td>\nvRAM<\/td>\n32 bit overhead<\/td>\n64 bit overhead<\/td>\n<\/tr>\n
1<\/td>\n256<\/td>\n79<\/td>\n174<\/td>\n<\/tr>\n
1<\/td>\n512<\/td>\n79<\/td>\n176<\/td>\n<\/tr>\n
1<\/td>\n1024<\/td>\n84<\/td>\n180<\/td>\n<\/tr>\n
1<\/td>\n2048<\/td>\n91<\/td>\n188<\/td>\n<\/tr>\n
1<\/td>\n4096<\/td>\n107<\/td>\n204<\/td>\n<\/tr>\n
1<\/td>\n8192<\/td>\n139<\/td>\n236<\/td>\n<\/tr>\n
1<\/td>\n16384<\/td>\n203<\/td>\n300<\/td>\n<\/tr>\n
2<\/td>\n256<\/td>\n97<\/td>\n288<\/td>\n<\/tr>\n
2<\/td>\n512<\/td>\n101<\/td>\n292<\/td>\n<\/tr>\n
2<\/td>\n1024<\/td>\n101<\/td>\n300<\/td>\n<\/tr>\n
2<\/td>\n2048<\/td>\n125<\/td>\n316<\/td>\n<\/tr>\n
2<\/td>\n4096<\/td>\n157<\/td>\n349<\/td>\n<\/tr>\n
2<\/td>\n8192<\/td>\n221<\/td>\n413<\/td>\n<\/tr>\n
2<\/td>\n16384<\/td>\n349<\/td>\n541<\/td>\n<\/tr>\n
4<\/td>\n256<\/td>\n129<\/td>\n511<\/td>\n<\/tr>\n
4<\/td>\n512<\/td>\n133<\/td>\n515<\/td>\n<\/tr>\n
4<\/td>\n1024<\/td>\n141<\/td>\n523<\/td>\n<\/tr>\n
4<\/td>\n2048<\/td>\n157<\/td>\n540<\/td>\n<\/tr>\n
4<\/td>\n4096<\/td>\n189<\/td>\n572<\/td>\n<\/tr>\n
4<\/td>\n8192<\/td>\n222<\/td>\n605<\/td>\n<\/tr>\n
4<\/td>\n16384<\/td>\n350<\/td>\n734<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Refer to page 30 of http:\/\/www.vmware.com\/pdf\/vsphere4\/r40\/vsp_40_resource_mgmt.pdf or page 136 of http:\/\/www.vmware.com\/pdf\/vi3_35\/esx_3\/r35\/vi3_35_25_resource_mgmt.pdf Some examples: With 1 vcpu and 256MB of RAM; the VM kernel requires 87MB for 32 bit VM\u2019s and 108MB for 64 bit VM\u2019s. With 8GM of RAM and 1 vCPU you\u2019ll need 188MB and 209MB for 32 and 64 bit. With 4 vCPU\u2019s […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[23,13,22,18,14],"class_list":["post-6","post","type-post","status-publish","format-standard","hentry","category-virtualization","tag-capacity","tag-esx","tag-performance","tag-vi3","tag-vmware"],"_links":{"self":[{"href":"http:\/\/iben.users.sonic.net\/wp\/wp-json\/wp\/v2\/posts\/6","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/iben.users.sonic.net\/wp\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/iben.users.sonic.net\/wp\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/iben.users.sonic.net\/wp\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/iben.users.sonic.net\/wp\/wp-json\/wp\/v2\/comments?post=6"}],"version-history":[{"count":10,"href":"http:\/\/iben.users.sonic.net\/wp\/wp-json\/wp\/v2\/posts\/6\/revisions"}],"predecessor-version":[{"id":13,"href":"http:\/\/iben.users.sonic.net\/wp\/wp-json\/wp\/v2\/posts\/6\/revisions\/13"}],"wp:attachment":[{"href":"http:\/\/iben.users.sonic.net\/wp\/wp-json\/wp\/v2\/media?parent=6"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/iben.users.sonic.net\/wp\/wp-json\/wp\/v2\/categories?post=6"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/iben.users.sonic.net\/wp\/wp-json\/wp\/v2\/tags?post=6"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}