Bug #80419 [Com]: opcache: free memory not reported as free

Edit report at https://bugs.php.net/bug.php?id=80419&edit=1 ID: 80419 Comment by: carsten-hammer at web dot de Reported by: carsten_hammer at web dot de Summary: opcache: free memory not reported as free Status: Open Type: Bug Package: opcache Operating System: Linux PHP Version: Irrelevant Block user comment: N Private report: N New Comment: Right, this is on nginx + php-fpm. Here is the phpinfo() output: Opcode Caching Up and Running Optimization Enabled SHM Cache Enabled File Cache Disabled Startup OK Shared memory model mmap Cache hits 0 Cache misses 1 Used memory 76277336 Free memory 125049256 Wasted memory 0 Interned Strings Used memory 237144 Interned Strings Free memory 6053864 Cached scripts 1 Cached keys 1 Max keys 16229 OOM restarts 0 Hash keys restarts 0 Manual restarts 0 opcache.blacklist_filename no value opcache.consistency_checks 0 opcache.dups_fix Off opcache.enable On opcache.enable_cli Off opcache.enable_file_override Off opcache.error_log no value opcache.file_cache no value opcache.file_cache_consistency_checks On opcache.file_cache_only Off opcache.file_update_protection 2 opcache.force_restart_timeout 180 opcache.huge_code_pages Off opcache.interned_strings_buffer 8 opcache.lockfile_path /tmp opcache.log_verbosity_level 1 opcache.max_accelerated_files 10000 opcache.max_file_size 0 opcache.max_wasted_percentage 5 opcache.memory_consumption 192 opcache.opt_debug_level 0 opcache.optimization_level 0x7FFEBFFF opcache.preferred_memory_model no value opcache.preload no value no value opcache.preload_user no value opcache.protect_memory Off opcache.restrict_api no value opcache.revalidate_freq 2 opcache.revalidate_path Off opcache.save_comments On opcache.use_cwd On opcache.validate_permission Off opcache.validate_root Off opcache.validate_timestamps On Local Values are exactly the same as Master Values. Previous Comments: ------------------------------------------------------------------------ [2020-11-26 11:26:40] cmb@php.net It could be helpful if you provide the full phpinfo() output of the OPcache extension. Also, which SAPI do you use? ------------------------------------------------------------------------ [2020-11-25 16:34:13] carsten_hammer at web dot de Description: ------------ It's either buggy output in phpinfo() or an actual bug in opcache, not quite sure which. Set opcache.memory_consumption to anything other than 128 to see the effect: memory_consumption at 64 = used memory: -57940392, free memory: 125049256 memory_consumption at 128 = used memory: 9168472, free memory: 125049256 memory_consumption at 192 = used memory: 76277336, free memory: 125049256 memory_consumption at 256 = used memory: 143386200, free memory: 125049256 Free memory never goes above 125049256, no matter what. Seen with version 7.3.20 and 7.4.6 on CentOS, 7.4.12 on Fedora as well as 7.4.13 on Arch Linux. ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=80419&edit=1