On Plesk for Windows, blank page is displayed in domain's Logs menu: PHP Fatal error: Allowed memory size of 268435456 bytes exhausted

Symptoms

• On a Plesk for Windows server, a blank page or HTTP error 500 is shown on attempt to open Log Browser in Domains > example.com > Logs. 

• The following or similar error can be found in the log file %plesk_dir%admin\logs\php_error.log:

  CONFIG_TEXT: PHP Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 341 bytes) in C:\Program Files (x86)\Plesk\admin\plib\LogBrowser\Parser.php on line 40

• Size of log files retained for the domain is too high:

  Note: This command will output the size of log files in megabytes.

  PS "{0:N2}" -f ((Get-Childitem -Recurse $env:plesk_vhosts\example.com\logs\iis | Measure-Object
  -Sum Length | Select Sum).Sum / 1MB )
  91762.00

Cause

Plesk Log Parser cannot process log files due to their size. For the better error reporting, a request PPPM-5375 was created.

Resolution

Log rotation can be enabled in order to minimize log-files size:

1. Connect to the server using RDP.

2. Enable log rotation for the affected domain:

   • If only one domain is affected:

     PS plesk bin site -u example.com -log-rotate true -log-bysize 10240 -log-compress true

   • If multiple domains are affected:

     PS @("example.com", "example.org") | % { &plesk bin site -u $_ -log-rotate true -log-bysize 10240 -log-compress true }

   Note: As a result, log files will be rotated and compressed as soon as they reach 10MB size.