#0 - Aug. 16, 2009, 2:47 p.m.
As mentioned in previous updates, we have been working diligently to address recent instance capacity issues through a number of reconfigurations and optimizations. These modifications have been an ongoing effort, and we’re pleased to announce that the process is now complete on all North American realms. Since the optimizations, all realms have shown an improvement in instance performance as well as a noticeable reduction in the amount of players hitting the instance limit. Please be assured that we will continue to monitor the situation closely and will make further changes as necessary. As always, thank you for your patience and understanding regarding this issue.
http://forums.worldofwarcraft.com/thread.html?topicId=19717482708&sid=1
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We understand that players have been experiencing situations where the active instance limit was reached. We realize that this is very frustrating for the affected players, and would like to say a few things regarding the issue.
The limit on active instances was originally implemented as an interim solution to ensure that all active instances perform smoothly. Within the last few weeks, we have configured and optimized our infrastructure to better handle the instance load, and many players are no longer experiencing issues with instance creation. However, to incorporate these upgrades across every realm is not a minor undertaking; it requires fairly complex coordination with third party affiliates who actually host the hardware we utilize.
This reconfiguration is already complete on more than 40% of the North American realms,the optimized realms are listed below, and the situation has noticeably improved on these realms. We are continuing to work towards the implementation of this reconfiguration for all realms, which we expect will resolve the instance creation issue for all players. We expect the optimization for all realms to be fully completed within the coming weeks, and would like to assure everyone that every effort is being made to ensure that this is completed as soon as possible.
Aegwynn
Akama
Aman'Thul
Arathor
Area 52
Auchindoun
Azjol-Nerub
Azuremyst
Barthilas
Blackrock
Blade's Edge
Blood Furnace
Bloodscalp
Bonechewer
Boulderfist
Bronzebeard
Caelestrasz
Chromaggus
Coilfang
Crushridge
Daggerspine
Darkspear
Dath'Remar
Dawnbringer
Draenor
Dragonblight
Dragonmaw
Draka
Drak'thul
Dreadmaul
Dunemaul
Eitrigg
Eldre'Thalas
Exodar
Feathermoon
Firetree
Fizzcrank
Frostmane
Frostmourne
Frostwolf
Galakrond
Garithos
Ghostlands
Grizzly Hills
Gundrak
Gurubashi
Hakkar
Jubei'Thos
Khaz Modan
Khaz'goroth
Kil'jaeden
Kilrogg
Korgath
Kul Tiras
Malorne
Mug'thol
Muradin
Nagrand
Nathrezim
Ner'zhul
Perenolde
Proudmoore
Rexxar
Runetotem
Saurfang
Scarlet Crusade
Sen'jin
Shadow Council
Shadowsong
Shattered Halls
Silver Hand
Silvermoon
Skywall
Smolderthorn
Spirestone
Stonemaul
Stormscale
Suramar
Terenas
Terokkar
Thaurissan
The Scryers
The Underbog
Thorium Brotherhood
Tichondrius
Uldum
Vek'nilash
Velen
Windrunner
Zangarmarsh
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Update: 8/26/2009
Aerie Peak
Altar of Storms
Alterac Mountains
Andorhal
Anetheron
Antonidas
Anub'arak
Anvilmar
Archimonde
Arygos
Black Dragonflight
Blackwater Raiders
Blackwing Lair
Bladefist
Borean Tundra
Cairne
Cenarion Circle
Cenarius
Dalaran
Dalvengyr
Darrowmere
Deathwing
Demon Soul
Dentarg
Doomhammer
Drak'Tharon
Drenden
Duskwood
Echo Isles
Executus
Farstriders
Fenris
Garrosh
Gnomeregan
Haomarush
Hydraxis
Hyjal
Icecrown
Jaedenar
Kel'Thuzad
Khadgar
Korialstrasz
Lethon
Lightbringer
Maiev
Mal'Ganis
Misha
Mok'Nathal
Moon Guard
Nazgrel
Nesingwary
Nordrassil
Norgannon
Onyxia
Quel'dorei
Ravenholdt
Rivendare
Scilla
Sentinels
Shandris
Shu'halo
Sisters of Elune
Steamwheedle Cartel
Tanaris
The Forgotten Coast
The Venture Co
Thrall
Tortheldrin
Turalyon
Uldaman
Undermine
Uther
Vashj
Winterhoof
Wyrmrest Accord
Ysera
Ysondre
Zuluhed
(Originally posted here: http://forums.worldofwarcraft.com/thread.html?topicId=19109959718&sid=1)