Darwin memory usage not good

[pelletierr]

Darwin display of memory usage is not good. I fixed it in my fork

[rk4an]

Hi,

Thanks for your contribution 😃 I paste the link of your commit below, we need a Mac computer to try it on different version.

https://github.com/pelletierr/phpsysinfo/commit/5b396a8b2885307b71a5331b3f0dab9801c0f29e#diff-d41d8cd98f00b204e9800998ecf8427e

[pelletierr]

If I had a beefier setup @ home, I'd virtualize 10.5 to 10.9 so you could try it. It was trial and error to get the good numbers. What Activity monitor was showing before 10.9 was different also.

[pelletierr]

Oh.. and I'm running my patch here : http://www.menzonet.org/phpSysInfo :)

[namiltd]

Please paste output of commands:
vm_stat
sysctl hw.memsize

I'll test it tomorrow morning on different versions of the system.

[namiltd]

Unfortunately, version 10.8.5 received the wrong values

[pelletierr]

vm_stat : Mach Virtual Memory Statistics: (page size of 4096 bytes)
Pages free: 753222.
Pages active: 1870856.
Pages inactive: 535981.
Pages speculative: 531793.
Pages throttled: 0.
Pages wired down: 443492.
Pages purgeable: 277.
"Translation faults": 2912088170.
Pages copy-on-write: 239224603.
Pages zero filled: 962449612.
Pages reactivated: 378063.
Pages purged: 635699.
File-backed pages: 844582.
Anonymous pages: 2094048.
Pages stored in compressor: 79413.
Pages occupied by compressor: 56969.
Decompressions: 2126.
Compressions: 82387.
Pageins: 1961548.
Pageouts: 23343.
Swapins: 264.
Swapouts: 264.

hw.memsize: 17179869184

Note that Activity Monitor doesn't show the same values in 10.8 and 10.9. I changed phpSysInfo to show the 10.9 values, which IMHO makes more sense than what was shown prior to Mavericks, since OS X was doing a lot of file cache but was showing that memory as free.

[namiltd]

Paste values ​​from Activity Monitor and corresponding vm_stat.

[pelletierr]

Mach Virtual Memory Statistics: (page size of 4096 bytes)
Pages free: 10618.
Pages active: 1894043.
Pages inactive: 988141.
Pages speculative: 806200.
Pages throttled: 0.
Pages wired down: 437176.
Pages purgeable: 10356.
"Translation faults": 2938853787.
Pages copy-on-write: 241916814.
Pages zero filled: 971743078.
Pages reactivated: 379509.
Pages purged: 637333.
File-backed pages: 1552166.
Anonymous pages: 2136218.
Pages stored in compressor: 77894.
Pages occupied by compressor: 56429.
Decompressions: 3639.
Compressions: 82391.
Pageins: 1973731.
Pageouts: 23343.
Swapins: 264.
Swapouts: 264.

[namiltd]

Try now.

[pelletierr]

It doesn't make sense...

[namiltd]

Mio <-> Gio

10.01+5,75 = 15.75
15.99-15.75=0,24 = only 240 Mio unknown memory

Look at: http://www.badrit.com/blog/2014/5/1/how-to-calc-memory-usage-in-mavericks-programmatically

[pelletierr]

Anonymous pages doesn't work to list app memory. My server's runing 7.5GiO/8GiO app memory all the time.

[namiltd]

appMemory means "Kernel + applications" (Pages wired down + Anonymous pages)

[pelletierr]

It is now what Activity Monitor shows though.

[namiltd]

If ok close issue (also check your second issue).

[pelletierr]

sorry, said "now" but wanted to say "not"

[pelletierr]

I guess best option would be to define new mem variables to show wired and compressed. I started looking into it.

[namiltd]

Test now (Pages occupied by compressor as buffers).

[pelletierr]

You should'nt set buffer to 0 if there's nothing, that way the line won't be drawn