i can't identfy these tweaks

[spiritraider]

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management]
"LargeSystemCache"=dword:00000000
"NonPagedPoolQuota"=dword:00000000
"NonPagedPoolSize"=dword:00000000
"PagedPoolQuota"=dword:00000000
"PagedPoolSize"=dword:00000000
"SecondLevelDataCache"=dword:00000000
"SystemPages"=dword:0007b000
"PagingFiles"=hex(7):43,00,3a,00,5c,00,70,00,61,00,67,00,65,00,66,00,69,00,6c,\
00,65,00,2e,00,73,00,79,00,73,00,20,00,33,00,38,00,34,00,20,00,31,00,37,00,\
30,00,30,00,00,00,00,00
"PhysicalAddressExtension"=dword:00000000
"SessionViewSize"=dword:00000030
"SessionPoolSize"=dword:00000004
"WriteWatch"=dword:00000001
"ClearPageFileAtShutdown"=dword:00000000
"DisablePagingExecutive"=dword:00000001

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management\PrefetchParameters]
"VideoInitTime"=dword:00000261
"EnablePrefetcher"=dword:00000003
"AppLaunchMaxNumPages"=dword:00000fa0
"AppLaunchMaxNumSections"=dword:000000aa
"AppLaunchTimerPeriod"=hex:80,69,67,ff,ff,ff,ff,ff
"BootMaxNumPages"=dword:0001f400
"BootMaxNumSections"=dword:00000ff0
"BootTimerPeriod"=hex:00,f2,d8,f8,ff,ff,ff,ff
"MaxNumActiveTraces"=dword:00000008
"MaxNumSavedTraces"=dword:00000008
"RootDirPath"="Prefetch"
"HostingAppList"="DLLHOST.EXE,MMC.EXE,RUNDLL32.EXE"

i can't identfy these tweaks

NonPagedPoolQuota

NonPagedPoolSize

PagedPoolQuota

PagedPoolSize

PagingFiles

PhysicalAddressExtension

SessionViewSize

WriteWatch

VideoInitTime

EnablePrefetcher

AppLaunchMaxNumPages

AppLaunchMaxNumSections

AppLaunchTimerPeriod

BootMaxNumPages

BootMaxNumSections

BootTimerPeriod

MaxNumActiveTraces

MaxNumSavedTraces

RootDirPath

HostingAppList

i am compiling registry tweaks ,but i don't know what they do and which value they take.

for example bootmaxnumsection do blablaaa.....

please help