Thunderbird:Testing:Memory Usage Problems: Difference between revisions

Thunderbird slowness can be caused by CPU, memory and disk activity and come from many sources. The steps below are simplified to be clear and easy to follow, and cover the many possibilities. '''To have the best possible chance of success, please step through the full list.'''   

== Diagnosis Introduction ==

* We avoid creating a new data profile, because creating a new profile can create its own set of issues. But a new profile is one possible solution.

== Diagnosis Steps ==

Did you check the items above in [[#Diagnosis Introduction|Diagnosis Introduction]]?

#Start Thunderbird in [https://support.mozilla.org/kb/troubleshoot-mode-thunderbird Troubleshoot Mode]. If it helped then start in normal mode and if the problem returned:<small>

#*Visit Add-ons and Themes - disable two or more extensions, themes or language packs at a time to determine which might be causing the problem. Are any in the [[#Other_Software|list of Problem Extensions]]?   

# 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")

# '''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" at the top of the folder pane?  Or are have you created virtual folders?  These iterate over multiple folders and can affect responsiveness.

#* Do any Inbox or filtered folders have several thousand messages?  If so, especially for Inbox, consider deleting some messages or moving some to another folder with [https://support.mozilla.org/en-US/kb/archived-messages Archive] or some other method.

#* Are [https://support.mozilla.org/en-US/kb/compacting-folders compacts] routinely performed?  Compact must be automatic or done regularly (at least weekly) using [https://support.mozilla.org/en-US/kb/menu-reference#w_compact-folders manual File > Compact Folders]?</small>

#* Try disabling two or more calendars at a time.  

#* If you have many recurring, never ending calendar appointments, try reducing the time period and number of them. Less likely starting with version 128's fix for {{bug|1844408}}. Examples: [https://www.reddit.com/r/Thunderbird/comments/16c89wo], [https://www.reddit.com/r/Thunderbird/comments/18ypd8r/comment/kgcyox8/]

# 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 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>  

# Is your '''[https://support.mozilla.org/en-US/kb/profiles-tb Thunderbird profile]''' or any part of Thunderbird <u>not</u> on a local disk? If not local, does it preform better when it is moved to the local disk?<small>

#* Cloud storage is not supported.

#* Check BIOS settings: [[http://forums.mozillazine.org/viewtopic.php?p=14773844#p14773844 hanging when sending messages if VT-x is enabled in BIOS]]

#* If Thunderbird is running in a VM (virtual machine), is it better when not virtualized?</small>

#* Is filter logging enabled at Tools > Filters?  (look for filterlog.html files - large logs cause high overhead)

#* Do you use server side message filters to place messages in folders? {{Bug|589310}}

#* 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/]. Are you running an old version? Consider updating. [http://forums.mozillazine.org/viewtopic.php?p=13605851#p13605851 hangs on Ubuntu 10.04, 14.04 works]

#* On macOS, try disabling Thunderbird's access to Mac Contacts in Mac System Settings > Privacy & Security > Contacts.  

#* uninstall Thunderbird, then '''DELETE''' the Thunderbird '''PROGRAM''' directory (not the data directory), then [https://www.mozilla.org/thunderbird/ download], reinstall, and retest Thunderbird. If using beta get it from [https://www.thunderbird.net/download/beta/ channels].

#*If [[#Memory Overview|Thunderbird memory usage is more than 1.5GB or more]] then folders may be corrupted or are not being closed. Please get a diagnostic log of Thunderbird activity with '''MSGDB:5,timestamp''' using [[MailNews:Logging|logging instructions]], then [https://bugzilla.mozilla.org/enter_bug.cgi?product=Thunderbird&format=guided file a bug], and attach the zipped log file using "Add an attachment".</small>

<!-- not a factor since version 91 # Is panacea.dat cache file in [https://support.mozilla.org/en-US/kb/profiles-tb your profile] too big? <small>(>10MB is probably too big. Calculate with thunderbird stopped: is panacea.dat larger than #folders*0.3k? See [https://bugzilla.mozilla.org/show_bug.cgi?id=65086#c34 bug 65086], {{bug|1084276}})</small> -->

Create a [https://support.mozilla.org/en-US/questions/new/thunderbird/form support request] or [https://bugzilla.mozilla.org/enter_bug.cgi?product=Thunderbird&format=guided new bug report] with

* '''State that you reviewed this document''', and which step numbers made things better or worse.