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Introducing extended app process management.

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- Pre-fork 'processes.spare' application processes;
- fork more processes to keep 'processes.spare' idle processes;
- fork on-demand up to 'processes.max' count;
- scale down idle application processes above 'processes.spare' after
  'processes.idle_timeout';
- number of concurrently started application processes also limited by
  'processes.spare' (or 1, if spare is 0).
This commit is contained in:
Max Romanov
2018-01-29 16:17:36 +03:00
parent a36babddef
commit 9cd4fdbdb7
16 changed files with 984 additions and 139 deletions
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17
src/nxt_router.h
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@@ -83,18 +83,29 @@ struct nxt_app_s {
nxt_thread_mutex_t mutex; /* Protects ports queue. */
nxt_queue_t ports; /* of nxt_port_t.app_link */
nxt_queue_t spare_ports; /* of nxt_port_t.idle_link */
nxt_queue_t idle_ports; /* of nxt_port_t.idle_link */
nxt_timer_t idle_timer;
nxt_work_t adjust_idle_work;
nxt_event_engine_t *engine;
nxt_queue_t requests; /* of nxt_req_app_link_t */
nxt_queue_t pending; /* of nxt_req_app_link_t */
nxt_str_t name;
uint32_t pending_workers;
uint32_t workers;
uint32_t max_workers;
uint32_t pending_processes;
uint32_t processes;
uint32_t idle_processes;
uint32_t max_processes;
uint32_t spare_processes;
uint32_t max_pending_processes;
uint32_t max_pending_responses;
uint32_t max_requests;
nxt_msec_t timeout;
nxt_nsec_t res_timeout;
nxt_msec_t idle_timeout;
nxt_app_type_t type:8;
uint8_t live; /* 1 bit */