canmove, Confirmed users
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#* check for newer version of AV/firewall software, and check with vendor's support site for problem reports | #* check for newer version of AV/firewall software, and check with vendor's support site for problem reports | ||
#* uninstall Thunderbird, then '''DELETE''' the Thunderbird '''PROGRAM''' directory (not the data directory), then [https://www.mozilla.org/thunderbird/ download], reinstall, and retest Thunderbird. <small>If using beta get it from [https://www.thunderbird.net/download/beta/ channels].</small> | #* uninstall Thunderbird, then '''DELETE''' the Thunderbird '''PROGRAM''' directory (not the data directory), then [https://www.mozilla.org/thunderbird/ download], reinstall, and retest Thunderbird. <small>If using beta get it from [https://www.thunderbird.net/download/beta/ channels].</small> | ||
#Do you see "Unresponsive Script" or "Not Responding"? Is Thunderbird excluded in your [[Thunderbird:Testing:Antivirus Related Performance Issues|antivirus software]]? | |||
#Has a proxy ever been defined, and is it working correctly or was the proxy removed? (A proxy can cause "Unresponsive script") | |||
#Does turning off the status bar in View > Toolbars help improve performance? | |||
#Do you have Calendars? | #Do you have Calendars? | ||
#*Try disabling two or more calendars at a time. | #*Try disabling two or more calendars at a time. | ||
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#*Try setting calendar.caldav.multigetBatchSize > 100 <small>(100 is default, you must create the preference [https://bugzilla.mozilla.org/show_bug.cgi?id=1543953])</small> | #*Try setting calendar.caldav.multigetBatchSize > 100 <small>(100 is default, you must create the preference [https://bugzilla.mozilla.org/show_bug.cgi?id=1543953])</small> | ||
#'''If you have gmail accounts, is problem gone after [http://kb.mozillazine.org/Using_Gmail_with_Thunderbird_and_Mozilla_Suite#Subscriptions unsubscribing the "All Mail" folder]?''' | #'''If you have gmail accounts, is problem gone after [http://kb.mozillazine.org/Using_Gmail_with_Thunderbird_and_Mozilla_Suite#Subscriptions unsubscribing the "All Mail" folder]?''' | ||
#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. | |||
#'''Folders should be well maintained'''. Help | Troubleshooting lists large folders. Folders may also be broken. Signs of problems and common maintenance steps: | #'''Folders should be well maintained'''. Help | Troubleshooting lists large folders. Folders may also be broken. Signs of problems and common maintenance steps: | ||
#* Do you see high memory or delay when opening a | #* Do you see high memory or delay when opening a folder, deleting or archiving, moving message to a specific folder? | ||
#* Do any folders lose their sort order or column settings? | #* Do any folders lose their sort order or column settings? | ||
#* Do you empty Trash and Spam (junk) folders on a regular basis? '''These should not be larger than a few thousand messages, and you should not use these folders for long term storage. Does performance improve if you empty them?''' <small>An alternative to manual emptying is setting automatic retention value in Folder Properties. Also see [https://support.mozilla.org/en-US/questions/1226726, [https://support.mozilla.org/en-US/kb/menu-reference#w_empty-trash File menu], {{bug|1192827}}</small> | #* Do you empty Trash and Spam (junk) folders on a regular basis? '''These should not be larger than a few thousand messages, and you should not use these folders for long term storage. Does performance improve if you empty them?''' <small>An alternative to manual emptying is setting automatic retention value in Folder Properties. Also see [https://support.mozilla.org/en-US/questions/1226726, [https://support.mozilla.org/en-US/kb/menu-reference#w_empty-trash File menu], {{bug|1192827}}</small> | ||
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#Do you have thousands of contacts in your address book? <small>(possible related issues: google contacts add-on], [http://hogiblog.blogspot.com/2012/01/reducing-memory-usage-of-google.html?showComment=1333621724776#comment-c8055257360225747824]</small> | #Do you have thousands of contacts in your address book? <small>(possible related issues: google contacts add-on], [http://hogiblog.blogspot.com/2012/01/reducing-memory-usage-of-google.html?showComment=1333621724776#comment-c8055257360225747824]</small> | ||
<!-- fixed in 76 #Are you using chat? {{bug|1575214}} --> | <!-- fixed in 76 #Are you using chat? {{bug|1575214}} --> | ||
#If you see high CPU usage in Windows taskmgr, Mac activity manager, or linux top, sort the CPU column (details tab for Windows) 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 | |||
#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 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: | #If you have RSS news reader account: | ||
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#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> | ||
#Common resource requirements, hardware checks: | #Common resource requirements, hardware checks: | ||
#* Do you have the [https://www.mozilla.org/en-US/thunderbird/52.0/system-requirements/ minimum hardware requirements], | #* Do you have the [https://www.mozilla.org/en-US/thunderbird/52.0/system-requirements/ minimum hardware requirements], especially [[#Memory_Overview|memory]]? <small>NOTE: minimum recommended size may not be sufficient for <u>your</u> Thunderbird and total system's workload. Paging to a fast SSD will kill performance.</small> | ||
#* Consider hardware or virtualization problems [http://forums.mozillazine.org/viewtopic.php?p=14414969#p14414969], [https://support.mozilla.org/en-US/questions/1090651] | #* Consider hardware or virtualization problems [http://forums.mozillazine.org/viewtopic.php?p=14414969#p14414969], [https://support.mozilla.org/en-US/questions/1090651] | ||
#* Check BIOS settings: [[http://forums.mozillazine.org/viewtopic.php?f=39&t=3033410 hanging when sending messages if VT-x is enabled in BIOS]] | #* Check BIOS settings: [[http://forums.mozillazine.org/viewtopic.php?f=39&t=3033410 hanging when sending messages if VT-x is enabled in BIOS]] | ||
#* If Thunderbird is running in a VM (virtual machine), does it run much better when running not virtualized? | #* If Thunderbird is running in a VM (virtual machine), does it run much better when running not virtualized? | ||
# | #On Linux? | ||
#*A package might be causing the problem [https://www.reddit.com/r/Thunderbird/comments/183tc5h/suddenly_slow_thunderbird_on_linux_gentoo_how_to/] | #*A package might be causing the problem [https://www.reddit.com/r/Thunderbird/comments/183tc5h/suddenly_slow_thunderbird_on_linux_gentoo_how_to/] | ||
#*Are you running an old version of linux, consider updating. [http://forums.mozillazine.org/viewtopic.php?p=13605851#p13605851 hangs on Ubuntu 10.04, 14.04 works] | #*Are you running an old version of linux, consider updating. [http://forums.mozillazine.org/viewtopic.php?p=13605851#p13605851 hangs on Ubuntu 10.04, 14.04 works] | ||