CentOS 7 fully patched
Upgrade path from v3.4.15 to v4.0.3, then v4.0.4
when clicking reports / notifications it keeps loading the page but doesn't display a thing.
URL: http://zabbix/zabbix/report4.php?ddreset=1

Hi,
Thank you for reporting the issue.

Could you please provide a partial zabbix_server.log which contains the entries that were written at the time of the issue?

Thanks.

Please also attach your web server log file, there may be errors related.

webserver log 1 minute after selecting "notifications"

[Tue Feb 05 11:01:40.411996 2019] [:error] [pid 6541] [client 10.100.0.14:64729] PHP Fatal error:  Allowed memory size of 134217728 bytes exhausted (tried to allocate 32 bytes) in /usr/share/zabbix/include/db.inc.php on line 595, referer: http://zabbix/zabbix/zabbix.php?action=dashboard.view
[Tue Feb 05 11:02:19.134400 2019] [:error] [pid 22172] [client 10.100.0.14:64824] PHP Fatal error:  Allowed memory size of 134217728 bytes exhausted (tried to allocate 32 bytes) in /usr/share/zabbix/include/db.inc.php on line 595, referer: http://zabbix/zabbix/zabbix.php?action=dashboard.view

No zabbix_server logs relate to this on default logging level.

I increased zabbix logging to level 4. Any idea what I should look for?

Hi,

Please find the zabbix.conf file and edit the "memory_limit" value (default path - /etc/httpd/conf.d/zabbix.conf) to increase the allocated memory. This should resolve the issue.

Since this tracker is intended for bug reports and this cannot be classified as one, I will be closing this issue. If you have any further questions, please use our community forums located at www.zabbix.com/forum/

Do you run Zabbix in debug mode?

What is memory_limit in php.ini?

Changing memory_limit in zabbix.conf didn't help. But it did help to increase php.ini memory_limit from 128M to 512M.

Although after having changed that it still takes +30s to load the notifications page.

Only to say that

• exists also this post on SO Zabbix and "PHP Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 78 bytes)" 
• both php.ini and /etc/php-fpm.d/zabbix.conf have to be changed (Zabbix 6.4)

Many thanks to everyone
P.