Doc #79644 [Com]: OpCache opcache.max_wasted_percentage cannot be set over 0.50%

From: Date: Thu, 28 May 2020 16:15:33 +0000
Subject: Doc #79644 [Com]: OpCache opcache.max_wasted_percentage cannot be set over 0.50%
References: 1  Groups: php.doc.bugs 
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Edit report at https://bugs.php.net/bug.php?id=79644&edit=1

 ID:                 79644
 Comment by:         abuse at botrax dot com
 Reported by:        abuse at botrax dot com
 Summary:            OpCache opcache.max_wasted_percentage cannot be set
                     over 0.50%
 Status:             Verified
 Type:               Documentation Problem
 Package:            opcache
 Operating System:   CentOS 7
 PHP Version:        7.4.6
 Block user comment: N
 Private report:     N

 New Comment:

What is also confusing is why various plugins read the value as 0.50% instead of 50%

0.50% is vastly different from 50%.


Previous Comments:
------------------------------------------------------------------------
[2020-05-27 16:45:12] cmb@php.net

Indeed, 50% is the maximum permissible value.

------------------------------------------------------------------------
[2020-05-27 16:38:02] abuse at botrax dot com

Description:
------------
Zend Opcache v7.4.6 does not allow "opcache.max_wasted_percentage" to go over 0.50%, no
matter the setting in INI. 

Causes Opcache to be constantly reset

PHP 7.4.6 (cli) (built: May 12 2020 08:09:15) ( NTS )
Copyright (c) The PHP Group
Zend Engine v3.4.0, Copyright (c) Zend Technologies
    with the ionCube PHP Loader v10.4.0 (beta2), Copyright (c) 2002-2020, by ionCube Ltd.
    with Zend OPcache v7.4.6, Copyright (c), by Zend Technologies


"opcache.max_wasted_percentage"
Setting of 60 sets it to 0.05%
Setting of 50 sets it to 0.50%
Setting of 5 sets it to 0.05%
Setting of 6 sets it to 0.06%


Using PHP 7.4 from REMI repo
10-opcache.ini   /etc/opt/remi/php74/php.d

php -i
opcache.max_wasted_percentage => 50 => 50


Value is then verified from within WordPress plugins to display configuration of OpCache.

3 different WordPress plugins show "opcache.max_wasted_percentage" to be never above 0.50%



Expected result:
----------------
Expect "opcache.max_wasted_percentage" OpCache parameter to be set from 0 to 100 in
percentage.

Expect script to read value to go above 0.50% when setting any value larger than 1.

Value should return exact value configured in INI file.

Actual result:
--------------
OpCache

"opcache.max_wasted_percentage"
Setting of 60 sets it to 0.05%
Setting of 50 sets it to 0.50%
Setting of 5 sets it to 0.05%
Setting of 6 sets it to 0.06%


------------------------------------------------------------------------



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Edit this bug report at https://bugs.php.net/bug.php?id=79644&edit=1


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