/3gb, boot.ini, Αξίζει;

??ste?? p?? ?p???e? a??et? “?µ????” ???? ap? t? s???e???µ??? ???µ?s? ?a? ?at? p?s? p??te??eta? ? a? te???? ?a fa?e? ??p??a d?af??? st? perforrmance t?? windows.

?? d??µe ?µ?? p?? ?e?t????e? ? Windows Memory Manager ?a? t? a???ß?? ep????? ??e? ? s???e???µ??? ???µ?s?. ?a pa?a??t? ?s????? se 32bit ?e?t??????? ?a? ?p?? ?p?st????eta? t? 3gb.

St?? e?????s? t?? Windows o Memory Manager d?µ?????e? ??a Virtual Memory Space µe µ??e??? 4GB. Virtual s?µa??e? p?? p???e?ta? ??a µ?a pe????? µ??µ?? ? ?p??a µp??e? ?a ß??s?eta? st?? RAM ? st? pagefile, ?? efa?µ???? p??ta ?µ?? p??ta ß??p??? 4GB ????? ?a ????????? ?µesa p?? ß??s?eta? a?t?.

? Memory Manager ?????e? t?? pe????? µ??µ?? se 2 pe?????? t?? 2GB ?p?? fa??eta? pa?a??t?:

?? 2 pe?????? p?? fa????ta? e??p??et??? d?af??et????? s??p???. St? User ? Application Space e?te????ta? ??e? ?? efa?µ???? ?a? p????? p?atf??µe? ?p?? SQL, Exchange Server, Active Directory, DNS ??p. S?µe??t??? t? executable t?? AD de? e??a? ???? ap? t? ???st? LSASS (Local Security Authority Subsystem Service), t? ?p??? ?p???e? se ??e? t? te?e?ta?e? e?d?se?? t?? Windows ?a? ?ta? ??p???? Server a?a?aµß??e? ???? Domain Controller t? LSASS e?te?e? ???? Kerberos authentication, AD Replication ??p.

St?? ??s?a µ???? ed? ??e? ?? efa?µ???? ß??p??? µ?a pe????? 4GB a??? ? Memory Manager p?t? de? t?? af??e? ?a ???s?µ?p???s??? p??? ap? 2GB p?? e??a? t? ???? t?? pe??????.

St?? pe????? Kernel f??t????ta? drivers, ? p????a? t?? ?e?t???????? (kernel) ?a? ???a apa?a?t?ta st???e?a t?? ?e?t???????? ?p?? ta Page Table Entries. ? d?a??s?µ?? a???µ?? t?? PTEs e??a? ?d?a?te?a ???s?µ?? ??a t? ?e?t??????? ?a?  a?t? p?? ?????? e??a? ?a a?t?st???????? ta Pages st? Virtual Memory µe ta Memory Pages p?? ß??s???ta? st? f?s??? µ??µ? RAM.

?p????µe pa?a???????s??µe t?? a???µ? t?? PTEs ap? t? Performance Monitor µ?s? t?? counter “Memory –>Free System Page Table Entries” . Se pe??pt?s? p?? ? d?a??s?µ?? a???µ?? p?se? ??t? ap? 10.000 ? sta?e??t?ta t?? s?st?µat?? e??a? ???a?? ?a? ß??s??µaste ???t? se blue screen. S?????? ?ta? µe???eta? s?µa?t??? ? a???µ?? t??? ?fe??eta? se ??p??? memory leak.

** ???s??? st? Performance tool does not accurately show the available Free PTEs?p?? sta 2003 p??? t? SP1 t? Performance Monitor de? ?ataµet???se s?st? ta PTEs.

???s??t??ta? t? /3gb st? boot.ini ? ?ata??µ? t?? µ??µ?? ???eta? ?? e???:

?? s?st?µa d?a??te? p???? 3GB User ?a? 1Gb Kernel Space. ???? t?? µe??s?? t?? Kernel Space ta e?e??e?a PTEs µe?????ta? st? µ?s? ?p?te apa?te?ta? ep?p???? pa?a???????s? ??a t?? e?st??e?a t?? ?e?t????????.

?eßa??? ?t? d?saµe pa?ap??? µ??µ? st?? efa?µ???? de? s?µa??e? ?t? ?a t? ???s?µ?p???s??? ????a? ??at? a?t? ?a ???e? µ??? ?ta? t? ??e?????ta? p?a?µat??? ?a? ??? ??at? ap?? ?p???e? d?a??s?µ?.

?? /3gb se Domain Controllers p??te??eta? st?? pe??pt?s? p?? ? ß?s? ??e? µ??e??? µe?a??te?? ap? 1.5Gb ?a? t? s?st?µa d?a??te? µ??µ? RAM pe??ss?te?? ap? 1.5GB. ???pe? ?a ??ß??µe ?p??? µa? ?a? t? ?e????? p?? ? AD ß?s? (default: \windows\ntds\ntds.dit) de? f??t??eta? e?’ ????????? st?? µ??µ? ?at? t?? e?????s? a??? “a?eßa??e?” st?? µ??µ? ?s? ???s?µ?p??e?ta?. ?p?µ???? se DCs ?? ?p???? de? ???s?µ?p?????ta? ?d?a?te?a t? /3gb µp??e? ?a µ?? ??e? ???µa.

??a????? ?s??e? ??a ??e? t?? efa?µ????, ??’ a?t? ?a? p??te??eta? p??? p??ß??µe st?? e?e???p???s? t?? s???e???µ???? ???µ?s?? ?a ????µe d?e?e???se? ?at? p?s? t? ??e?a??µaste ?a??? ?a? ?a pa?a????????µe t? sta?e??t?ta t?? s?st?µat??.

?e??ss?te?e? p????f???e? ??a t? Lsass.exe st? d?e????s? Memory usage by the Lsass.exe process