canmove, Confirmed users
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| m (→Diagnosis Steps:  add multigetBatchSize) | m (→Diagnosis Steps:  add unified folders) | ||
| Line 70: | Line 70: | ||
| #Does turning off the status bar in View > Toolbars help improve performance? | #Does turning off the status bar in View > Toolbars help improve performance? | ||
| #If you see high CPU usage in Windows taskmgr, sort the CPU column in the details tab to see if [http://forums.mozillazine.org/viewtopic.php?p=12641015#p12641015 mozilla updater.exe], Window's update, or some other process is hogging CPU. | #If you see high CPU usage in Windows taskmgr, sort the CPU column in the details tab to see if [http://forums.mozillazine.org/viewtopic.php?p=12641015#p12641015 mozilla updater.exe], Window's update, or some other process is hogging CPU. | ||
| #Is "Unified Folders" enabled in "Folder Modes"?  Or are have you created virtual folders?  These will iterate over many folders, and will make large searches.  | |||
| #If you have newsgroup accounts, then in Account Settings|Server Settings try disabling "Check for new messages at startup". <small>If problem is gone you may be seeing [https://groups.google.com/d/msg/mozilla.support.thunderbird/_6yvdz0de9g/9KJVVBqIAwAJ many newsgroups with many unread messages], {{bug|185634}}, {{Bug|541001}}, or [http://forums.mozillazine.org/viewtopic.php?p=9900989&sid=e32e1e42a3ddcac8c8605a1cbea6b2e8#p9900989].</small>  | |||
| #If you have RSS news reader account: | |||
| #* Is "Automatically create tags from feed category names" enabled? [https://bugzilla.mozilla.org/show_bug.cgi?id=1342054]  | |||
| #* In Account Settings|Server Settings disable "Check for new messages at startup". <small>If problem is gone you may be seeing {{Bug|551144}} (fixed in version 13).</small>  | |||
| # Any Outlook or Hotmail accounts? {{Bug|1355885}} | |||
| #Is filter logging enabled at Tools > Filters?  (look for filterlog.html files - large logs cause high overhead) | |||
| #Is your '''[https://support.mozilla.org/en-US/kb/profiles-tb Thunderbird profile]''' or any part of Thunderbird <u>not</u> on a local hard drive? If not local, does it preform better when it is moved to the local disk? | #Is your '''[https://support.mozilla.org/en-US/kb/profiles-tb Thunderbird profile]''' or any part of Thunderbird <u>not</u> on a local hard drive? If not local, does it preform better when it is moved to the local disk? | ||
| #* Cloud storage is not supported. | #* Cloud storage is not supported. | ||
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| #* in Windows you want at least 20% free disk space, and for spinning disks do periodic defrags | #* in Windows you want at least 20% free disk space, and for spinning disks do periodic defrags | ||
| #* check whether any OS or application update process is in progress, for example [https://support.mozilla.org/en-US/questions/1226979 Windows update] | #* check whether any OS or application update process is in progress, for example [https://support.mozilla.org/en-US/questions/1226979 Windows update] | ||
| #Do you use server side message filters to place messages in folders? <small>{{Bug|589310}}</small> | #Do you use server side message filters to place messages in folders? <small>{{Bug|589310}}</small> | ||
| #Check activity in Tools > Activity Manager to see if ISP (mail provider) is being lame. Examples: Yahoo and Gmail (and others) may cause message folders to be redownloaded.  <small>[https://support.mozilla.org/en-US/questions/1202731 slow downloading email (Centurylink)]</small> | #Check activity in Tools > Activity Manager to see if ISP (mail provider) is being lame. Examples: Yahoo and Gmail (and others) may cause message folders to be redownloaded.  <small>[https://support.mozilla.org/en-US/questions/1202731 slow downloading email (Centurylink)]</small> | ||