Bug #77862 [Opn]: opcache.huge_code_pages can not be disabled

Edit report at https://bugs.php.net/bug.php?id=77862&edit=1 ID: 77862 User updated by: hawu at fast-mail dot one Reported by: hawu at fast-mail dot one Summary: opcache.huge_code_pages can not be disabled Status: Open Type: Bug -Package: PHP options/info functions +Package: opcache Operating System: Debian 9 PHP Version: 7.3Git-2019-04-07 (snap) Block user comment: N Private report: N New Comment: . Previous Comments: ------------------------------------------------------------------------ [2019-04-07 01:21:49] hawu at fast-mail dot one Description: ------------ php --version PHP 7.3.3-1+0~20190307202245.32+stretch~1.gbp32ebb2 (cli) (built: Mar 7 2019 20:22:46) ( NTS ) Copyright (c) 1997-2018 The PHP Group Zend Engine v3.3.3, Copyright (c) 1998-2018 Zend Technologies with Zend OPcache v7.3.3-1+0~20190307202245.32+stretch~1.gbp32ebb2, Copyright (c) 1999-2018, by Zend Technologies Using Debian 9 with 1GB hugepages configured as such: "transparent_hugepage=never default_hugepagesz=1GB hugepagesz=1GB hugepages=4" Setting opcache.huge_code_pages=0 will NOT disable usage of huge pages. # cat /etc/php/7.3/fpm/php.ini | grep opcache. [opcache] opcache.enable=1 ;opcache.enable_cli=0 opcache.memory_consumption=256 ;opcache.interned_strings_buffer=8 ;opcache.max_accelerated_files=10000 ;opcache.max_wasted_percentage=5 ;opcache.use_cwd=1 ;opcache.validate_timestamps=1 ;opcache.revalidate_freq=2 ;opcache.revalidate_path=0 ;opcache.save_comments=1 ;opcache.enable_file_override=0 ;opcache.optimization_level=0x7FFFBFFF ;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= ;opcache.file_cache= ;opcache.file_cache_only=0 ;opcache.file_cache_consistency_checks=1 ;opcache.file_cache_fallback=1 opcache.huge_code_pages=0 ;opcache.validate_permission=0 ;opcache.validate_root=0 ;opcache.opt_debug_level=0 # cat /proc/meminfo | grep HugePages_ HugePages_Total: 4 HugePages_Free: 3 HugePages_Rsvd: 0 HugePages_Surp: 0 # service php7.3-fpm stop # cat /proc/meminfo | grep HugePages_ HugePages_Total: 4 HugePages_Free: 4 HugePages_Rsvd: 0 HugePages_Surp: 0 However setting opcache.enabled=0 (or stopping php7.3-fpm) will result in huge pages not being used. Changing opcache.memory_consumption DOES have an effect of huge pages (setting it to 1500 will reserve an additional 1 GB huge page) cat /proc/meminfo | grep HugePages_ HugePages_Total: 4 HugePages_Free: 3 HugePages_Rsvd: 1 HugePages_Surp: 0 There does not seem to be a way to use opcache without using huge pages. The only way to not use huge pages is to disable cache completely via opcache.enabled=0. Also, looking at the output of "print_r(opcache_get_configuration())" does not mention opcache.huge_code_pages regardless of how it is configured (it does show status of opcache.enabled, opcache.memory_consumption and others). ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=77862&edit=1