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Lost connection to MySQL server during query

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Author Message

laurent le cadet

Monday 28 July 2008 7:23:48 am

Hi,

I have a site which tooks a very very long time to rebuild caches after clearing cache-block and template cache.

I have this error message (error.log) :

[ Jul 28 2008 16:07:43 ] [86.67.69.64] eZMySQLDB:
Connection error: Couldn't connect to database. Please try again later or inform the system administrator.
Lost connection to MySQL server during query

There is about 500 users connected at the same time.
Is there a relation (?) between users request and cache rebuilt ?

Any hints ?

Best regards.

laurent

Ps : on the pre-prod site there is no crash

Stéphane Couzinier

Monday 11 August 2008 2:07:30 pm

1) use eztc.php to rebuild your template compile.
2) don't remove all your cb and cache content at the same time.
3) reduce the number of SQL query generate by your tpl.
on a small dev mysql server sometime we have this error if there is a lot of query in the page or a lot of user at the same time

 

http://www.kouz-cooking.fr

eZ debug

Timing: Jan 18 2025 20:50:15
Script start
Timing: Jan 18 2025 20:50:15
Module start 'content'
Timing: Jan 18 2025 20:50:15
Module end 'content'
Timing: Jan 18 2025 20:50:16
Script end

Main resources:

Total runtime0.7672 sec
Peak memory usage4,096.0000 KB
Database Queries191

Timing points:

CheckpointStart (sec)Duration (sec)Memory at start (KB)Memory used (KB)
Script start 0.00000.0068 589.0781180.8047
Module start 'content' 0.00680.6403 769.8828526.8672
Module end 'content' 0.64710.1201 1,296.7500332.7188
Script end 0.7672  1,629.4688 

Time accumulators:

 Accumulator Duration (sec) Duration (%) Count Average (sec)
Ini load
Load cache0.00410.5308210.0002
Check MTime0.00150.1979210.0001
Mysql Total
Database connection0.00060.078310.0006
Mysqli_queries0.702491.55331910.0037
Looping result0.00170.22621890.0000
Template Total0.734195.720.3670
Template load0.00290.381120.0015
Template processing0.731195.297220.3656
Template load and register function0.00010.013610.0001
states
state_id_array0.00070.089810.0007
state_identifier_array0.00210.272720.0010
Override
Cache load0.00240.3177200.0001
Sytem overhead
Fetch class attribute can translate value0.00130.172630.0004
Fetch class attribute name0.00120.151730.0004
XML
Image XML parsing0.00090.119030.0003
class_abstraction
Instantiating content class attribute0.00000.003630.0000
General
dbfile0.00360.4633270.0001
String conversion0.00000.000930.0000
Note: percentages do not add up to 100% because some accumulators overlap

CSS/JS files loaded with "ezjscPacker" during request:

CacheTypePacklevelSourceFiles
CSS0extension/community/design/community/stylesheets/ext/jquery.autocomplete.css
extension/community_design/design/suncana/stylesheets/scrollbars.css
extension/community_design/design/suncana/stylesheets/tabs.css
extension/community_design/design/suncana/stylesheets/roadmap.css
extension/community_design/design/suncana/stylesheets/content.css
extension/community_design/design/suncana/stylesheets/star-rating.css
extension/community_design/design/suncana/stylesheets/syntax_and_custom_tags.css
extension/community_design/design/suncana/stylesheets/buttons.css
extension/community_design/design/suncana/stylesheets/tweetbox.css
extension/community_design/design/suncana/stylesheets/jquery.fancybox-1.3.4.css
extension/bcsmoothgallery/design/standard/stylesheets/magnific-popup.css
extension/sevenx/design/simple/stylesheets/star_rating.css
extension/sevenx/design/simple/stylesheets/libs/fontawesome/css/all.min.css
extension/sevenx/design/simple/stylesheets/main.v02.css
extension/sevenx/design/simple/stylesheets/main.v02.res.css
JS0extension/ezjscore/design/standard/lib/yui/3.17.2/build/yui/yui-min.js
extension/ezjscore/design/standard/javascript/jquery-3.7.0.min.js
extension/community_design/design/suncana/javascript/jquery.ui.core.min.js
extension/community_design/design/suncana/javascript/jquery.ui.widget.min.js
extension/community_design/design/suncana/javascript/jquery.easing.1.3.js
extension/community_design/design/suncana/javascript/jquery.ui.tabs.js
extension/community_design/design/suncana/javascript/jquery.hoverIntent.min.js
extension/community_design/design/suncana/javascript/jquery.popmenu.js
extension/community_design/design/suncana/javascript/jScrollPane.js
extension/community_design/design/suncana/javascript/jquery.mousewheel.js
extension/community_design/design/suncana/javascript/jquery.cycle.all.js
extension/sevenx/design/simple/javascript/jquery.scrollTo.js
extension/community_design/design/suncana/javascript/jquery.cookie.js
extension/community_design/design/suncana/javascript/ezstarrating_jquery.js
extension/community_design/design/suncana/javascript/jquery.initboxes.js
extension/community_design/design/suncana/javascript/app.js
extension/community_design/design/suncana/javascript/twitterwidget.js
extension/community_design/design/suncana/javascript/community.js
extension/community_design/design/suncana/javascript/roadmap.js
extension/community_design/design/suncana/javascript/ez.js
extension/community_design/design/suncana/javascript/ezshareevents.js
extension/sevenx/design/simple/javascript/main.js

Templates used to render the page:

UsageRequested templateTemplateTemplate loadedEditOverride
1node/view/full.tplfull/forum_topic.tplextension/sevenx/design/simple/override/templates/full/forum_topic.tplEdit templateOverride template
1content/datatype/view/ezimage.tpl<No override>extension/sevenx/design/simple/templates/content/datatype/view/ezimage.tplEdit templateOverride template
2content/datatype/view/ezxmltext.tpl<No override>extension/community_design/design/suncana/templates/content/datatype/view/ezxmltext.tplEdit templateOverride template
3content/datatype/view/ezxmltags/paragraph.tpl<No override>extension/ezwebin/design/ezwebin/templates/content/datatype/view/ezxmltags/paragraph.tplEdit templateOverride template
1content/datatype/view/ezxmltags/literal.tpl<No override>extension/community/design/standard/templates/content/datatype/view/ezxmltags/literal.tplEdit templateOverride template
2content/datatype/view/ezxmltags/line.tpl<No override>design/standard/templates/content/datatype/view/ezxmltags/line.tplEdit templateOverride template
1pagelayout.tpl<No override>extension/sevenx/design/simple/templates/pagelayout.tplEdit templateOverride template
 Number of times templates used: 11
 Number of unique templates used: 7

Time used to render debug report: 0.0001 secs