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Added status bit BREF_QUERY_ACTIVE to indicate if a query, other than session command, sent to backend for execution. The flag is cleared when the first packet belonging to the response arrives.

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The flag is part of the active operation counting, which is utilized in load balancing. The active operation count per backend is used by default as criteria when router chooses to which backend a query should be routed.
This commit is contained in:
VilhoRaatikka
2014-06-30 13:44:34 +03:00
parent 3e3c1af211
commit 6d672cb967
2 changed files with 44 additions and 36 deletions
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6
server/modules/include/readwritesplit.h
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@ -52,13 +52,15 @@ typedef enum prep_stmt_state {
typedef enum bref_state {
BREF_IN_USE = 0x01,
BREF_WAITING_RESULT = 0x02, /*< for anything that responds */
BREF_CLOSED = 0x04
BREF_WAITING_RESULT = 0x02, /*< for session commands only */
BREF_QUERY_ACTIVE = 0x04, /*< for other queries */
BREF_CLOSED = 0x08
} bref_state_t;
#define BREF_IS_NOT_USED(s) (s->bref_state & ~BREF_IN_USE)
#define BREF_IS_IN_USE(s) (s->bref_state & BREF_IN_USE)
#define BREF_IS_WAITING_RESULT(s) (s->bref_num_result_wait > 0)
#define BREF_IS_QUERY_ACTIVE(s) (s->bref_state & BREF_QUERY_ACTIVE)
#define BREF_IS_CLOSED(s) (s->bref_state & BREF_CLOSED)
typedef enum backend_type_t {