If turn on nginx debug log ./configure --with-debug ..., but not select debug_http log level.
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ...) will be ignored, malloc_trim() can't be executed as function parameter.
And memory isn't returned to OS immediately. This bug may cause serious memory leak, OOM.
Simply, ngx_log_debug1 is optional, but malloc_trim obligatory.
If turn on nginx debug log
Simply,
./configure --with-debug ..., but not selectdebug_httplog level. ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ...) will be ignored, malloc_trim() can't be executed as function parameter. And memory isn't returned to OS immediately. This bug may cause serious memory leak, OOM.ngx_log_debug1is optional, butmalloc_trimobligatory.