To clarify, you have a PHP process that exits immediately on startup? or sometime later? With 0xFFFFFFFE?

Do you have several processes exiting at about the same time?


Opcache.mmap_base directive is to deal with an issue we fixed in 7.0.x where PHP exits immediately on startup with 0xC000005.

I want to be sure that issue hasn't reappeared.

Since that issue is fixed, we don't need opcache.mmap_base directive documentation.

But since you asked, opcache.mmap_base directive is Memory Address that needs to be free in all the php processes using opcache.


Your issue sounds like a separate issue from what opcache.mmap_base directive is for helping with...

Thank you for the response.

The error did not occur at startup but happened intermittently, about 15 times in 7000 page loads. They seemed somewhat clustered in time but still several minutes apart.

Since I set the opcache.mmap_base = 0x20000000 (a week ago) there have been no more OpCache crashes with error code 487 in the Event Viewer.

When googling Opcache error 487, there are two suggestions to change the mmap_base

https://github.com/zendtech/ZendOptimizerPlus/issues/167
https://bugs.php.net/bug.php?id=64926&edit=1

Best wishes,
Brjánn Ljótsson

Hmm...

What extensions are you using? just builtin extensions/DLLs or PECL?

What are the opcache.* INI directives you are using?

Which PHP build are you using (fe PHP-7.0.0-NTS-X64-VC14)? (the name of the .zip file you downloaded from windows.php.net)

For those 15/7000 page loads, was that load generated quickly within a few minutes, or did that take longer(hours, days)?

What is the value for the PHP_FCGI_MAX_REQUESTS setting?

That determines how many requests a PHP process will handle before its replaced/recycled.

Se answers below:

> What extensions are you using? just builtin extensions/DLLs or PECL?
Only DLLs
- GD2
- Multi-Byte String
- MySQL
- OpenSSL
- SOAP
- Tidy
- curl

> What are the opcache.* INI directives you are using?

opcache.enable=1
opcache.enable_cli=0
opcache.memory_consumption=64
opcache.interned_strings_buffer=16
opcache.max_accelerated_files=7693
;opcache.max_wasted_percentage=5
;opcache.use_cwd=1
opcache.validate_timestamps=1
opcache.revalidate_freq=0
;opcache.revalidate_path=0
;opcache.save_comments=1
opcache.fast_shutdown=1
;opcache.enable_file_override=0
;opcache.optimization_level=0xffffffff
;opcache.inherited_hack=1
;opcache.dups_fix=0
;opcache.blacklist_filename=
;opcache.max_file_size=0
;opcache.consistency_checks=0
;opcache.force_restart_timeout=180
;opcache.error_log=
;opcache.log_verbosity_level=1
;opcache.preferred_memory_model=
;opcache.protect_memory=0
;opcache.restrict_api=
opcache.mmap_base=0x20000000
;opcache.file_cache=
;opcache.file_cache_only=0
;opcache.file_cache_consistency_checks=1
;opcache.huge_code_pages=1

> Which PHP build are you using (fe PHP-7.0.0-NTS-X64-VC14)? 
php-7.0.1-nts-Win32-VC14-x64

> For those 15/7000 page loads, was that load generated quickly within a few minutes, 
> or did that take longer(hours, days)?
It was 7000 loads during one whole day

> What is the value for the PHP_FCGI_MAX_REQUESTS setting?
Set to 10000 according to instructions on http://php.net/manual/en/install.windows.iis7.php

Best wishes,
Brjánn Ljótsson

I think the documentation is now pretty clear about
opcache.mmap_base:
<https://www.php.net/manual/en/opcache.configuration.php#ini.opcache.mmap-base>