Hello, In "ngx_slab.c": static ngx_uint_t ngx_slab_max_size; [...] void ngx_slab_init(ngx_slab_pool_t *pool) { if (ngx_slab_max_size == 0) { Could one be sure, that "ngx_slab_max_size" is always "0"? Maybe better: static ngx_uint_t ngx_slab_max_size = 0; Thanks Marcus Posted at Nginx Forum: http://forum.nginx.org/read.php?2,51479,51479#msg-51479