Mercurial > hg > nginx
comparison src/http/ngx_http_cache.h @ 6445:c9d680b00744
Cache: added watermark to reduce IO load when keys_zone is full.
When a keys_zone is full then each next request to the cache is
penalized. That is, the cache has to evict older files to get a
slot from the keys_zone synchronously. The patch introduces new
behavior in this scenario. Manager will try to maintain available
free slots in the keys_zone by cleaning old files in the background.
author | Dmitry Volyntsev <xeioex@nginx.com> |
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date | Fri, 18 Mar 2016 15:08:21 +0300 |
parents | 043914d19be8 |
children | e08e741f74cd |
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6444:043914d19be8 | 6445:c9d680b00744 |
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136 ngx_rbtree_node_t sentinel; | 136 ngx_rbtree_node_t sentinel; |
137 ngx_queue_t queue; | 137 ngx_queue_t queue; |
138 ngx_atomic_t cold; | 138 ngx_atomic_t cold; |
139 ngx_atomic_t loading; | 139 ngx_atomic_t loading; |
140 off_t size; | 140 off_t size; |
141 ngx_uint_t count; | |
142 ngx_uint_t watermark; | |
141 } ngx_http_file_cache_sh_t; | 143 } ngx_http_file_cache_sh_t; |
142 | 144 |
143 | 145 |
144 struct ngx_http_file_cache_s { | 146 struct ngx_http_file_cache_s { |
145 ngx_http_file_cache_sh_t *sh; | 147 ngx_http_file_cache_sh_t *sh; |