osx - vm_stat displays less memory than in real -

update:

so, restarting mac did work known reason bug?

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i'm using vm_stat calculate ram info here

but when try add values , multiply page size im getting approx. 1.3gb less.

mach virtual memory statistics: (page size of 4096 bytes) pages free:                               22064. pages active:                            580105. pages inactive:                          472217. pages speculative:                         5594. pages throttled:                              0. pages wired down:                        559999. pages purgeable:                          29101. "translation faults":                 261945239. pages copy-on-write:                    6941679. pages 0 filled:                    165324784. pages reactivated:                     14573079. pages purged:                           1602247. file-backed pages:                       203023. anonymous pages:                         854893. pages stored in compressor:             1732046. pages occupied compressor:            456427. decompressions:                        11423912. compressions:                          20641865. pageins:                                4475678. pageouts:                                 32877. swapins:                                1714616. swapouts:                               2389086. 

so adding first 6 values , multiplying page size, im getting 6.7gb mac has 8gb.

so going wrong?

thank you!

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here result

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after reboot

it looks me need add in "pages occupied compressor". gets 8gb. reboot reset 0 didn't matter.