'Constant' issue when server under heavy load

Author Message

Tony Wood

Tuesday 13 May 2003 10:53:16 am

I have been running some load test and have found that when eZ us under really heavy loads, with PHP_Accelerator.

eZ gets virtual sites mixed up and thinks that another site has the constant value set for all sites.

To recreate :

1. Blow away apache with as many users as you can until it stops receiving packets.
2. Kill the processes or if you are running siege then these will stop anyway.
3. Wait till writes to HDD catch up
4. Load any site on that box

Has anyone else seen this? is this a known PHP bug? The site work well apart from the eZ error message and the sites are a little slower?

Note. To clear this problem you stop httpd and start again.

Error message below:

Warning: Constant ez_sys_debug_internals already defined in /mydir/lib/ezutils/classes/ezsys.php on line 60

Warning: Constant ez_level_notice already defined in /mydir/lib/ezutils/classes/ezdebug.php on line 85

Warning: Constant ez_level_warning already defined in /mydir/lib/ezutils/classes/ezdebug.php on line 86

Warning: Constant ez_level_error already defined in /mydir/lib/ezutils/classes/ezdebug.php on line 87

Warning: Constant ez_level_timing_point already defined in /mydir/lib/ezutils/classes/ezdebug.php on line 88

Warning: Constant ez_level_debug already defined in /mydir/lib/ezutils/classes/ezdebug.php on line 89

Warning: Constant ez_show_notice already defined in /mydir/lib/ezutils/classes/ezdebug.php on line 91

Warning: Constant ez_show_warning already defined in /mydir/lib/ezutils/classes/ezdebug.php on line 92

Warning: Constant ez_show_error already defined in /mydir/lib/ezutils/classes/ezdebug.php on line 93

Warning: Constant ez_show_timing_point already defined in /mydir/lib/ezutils/classes/ezdebug.php on line 94

Warning: Constant ez_show_debug already defined in /mydir/lib/ezutils/classes/ezdebug.php on line 95

Warning: Constant ez_show_all already defined in /mydir/lib/ezutils/classes/ezdebug.php on line 96

Warning: Constant ez_handle_none already defined in /mydir/lib/ezutils/classes/ezdebug.php on line 98

Warning: Constant ez_handle_from_php already defined in /mydir/lib/ezutils/classes/ezdebug.php on line 99

Warning: Constant ez_handle_to_php already defined in /mydir/lib/ezutils/classes/ezdebug.php on line 100

Warning: Constant ez_output_message_screen already defined in /mydir/lib/ezutils/classes/ezdebug.php on line 102

Warning: Constant ez_output_message_store already defined in /mydir/lib/ezutils/classes/ezdebug.php on line 103

Warning: Constant ez_debug_max_logfile_size already defined in /mydir/lib/ezutils/classes/ezdebug.php on line 105

Warning: Constant ez_debug_max_logrotate_files already defined in /mydir/lib/ezutils/classes/ezdebug.php on line 106

Tony Wood : twitter.com/tonywood
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eZ debug

Timing: Jan 18 2025 04:53:07
Script start
Timing: Jan 18 2025 04:53:07
Module start 'layout'
Timing: Jan 18 2025 04:53:07
Module start 'content'
Timing: Jan 18 2025 04:53:08
Module end 'content'
Timing: Jan 18 2025 04:53:08
Script end

Main resources:

Total runtime0.9419 sec
Peak memory usage4,096.0000 KB
Database Queries46

Timing points:

CheckpointStart (sec)Duration (sec)Memory at start (KB)Memory used (KB)
Script start 0.00000.0067 588.0469152.6406
Module start 'layout' 0.00670.0038 740.687539.4766
Module start 'content' 0.01050.9298 780.1641476.3359
Module end 'content' 0.94030.0015 1,256.500012.1250
Script end 0.9419  1,268.6250 

Time accumulators:

 Accumulator Duration (sec) Duration (%) Count Average (sec)
Ini load
Load cache0.00390.4158160.0002
Check MTime0.00180.1921160.0001
Mysql Total
Database connection0.00120.127010.0012
Mysqli_queries0.879293.3400460.0191
Looping result0.00050.0505440.0000
Template Total0.896295.220.4481
Template load0.00420.442620.0021
Template processing0.892194.709420.4460
Template load and register function0.00010.010510.0001
states
state_id_array0.00280.296410.0028
state_identifier_array0.00180.187020.0009
Override
Cache load0.00360.3834330.0001
Sytem overhead
Fetch class attribute can translate value0.00150.157910.0015
Fetch class attribute name0.00100.101120.0005
XML
Image XML parsing0.00050.052710.0005
class_abstraction
Instantiating content class attribute0.00000.000520.0000
General
dbfile0.00250.2602160.0002
String conversion0.00000.001140.0000
Note: percentages do not add up to 100% because some accumulators overlap

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
1content/datatype/view/ezxmltext.tpl<No override>extension/community_design/design/suncana/templates/content/datatype/view/ezxmltext.tplEdit templateOverride template
2content/datatype/view/ezxmltags/paragraph.tpl<No override>extension/ezwebin/design/ezwebin/templates/content/datatype/view/ezxmltags/paragraph.tplEdit templateOverride template
1content/datatype/view/ezxmltags/line.tpl<No override>design/standard/templates/content/datatype/view/ezxmltags/line.tplEdit templateOverride template
1print_pagelayout.tpl<No override>extension/community/design/community/templates/print_pagelayout.tplEdit templateOverride template
 Number of times templates used: 7
 Number of unique templates used: 6

Time used to render debug report: 0.0002 secs