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PG-186: Add support to monitor query execution plan.

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This commit is contained in:
Ibrar Ahmed
2021-03-17 18:56:39 +05:00
parent aa0ca050d5
commit e0fc683810
18 changed files with 499 additions and 533 deletions
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43
pg_stat_monitor.h
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@@ -127,8 +127,11 @@ typedef enum pgssStoreKind
* reference the underlying values in the arrays in the Counters struct,
* and this order is required in pg_stat_statements_internal().
*/
PGSS_PLAN = 0,
PGSS_PARSE = 0,
PGSS_PLAN,
PGSS_EXEC,
PGSS_ERROR,
PGSS_FINISHED,
PGSS_NUMKIND /* Must be last value of this enum */
} pgssStoreKind;
@@ -160,37 +163,26 @@ typedef struct CallTime
typedef struct pgssQueryHashKey
{
uint64 queryid; /* query identifier */
uint64 bucket_id; /* bucket number */
uint64 queryid; /* query identifier */
uint64 userid; /* user OID */
uint64 dbid; /* database OID */
uint64 ip; /* client ip address */
} pgssQueryHashKey;
typedef struct pgssQueryEntry
{
pgssQueryHashKey key; /* hash key of entry - MUST BE FIRST */
uint64 pos; /* bucket number */
uint64 state; /* query state */
} pgssQueryEntry;
typedef struct PlanInfo
{
uint64 planid; /* plan identifier */
uint64 plans; /* how many times plan */
CallTime time;
char plan_text[PLAN_TEXT_LEN]; /* plan text */
} PlanInfo;
/* shared nenory storage for the query */
typedef struct pgssPlanHashKey
{
uint64 query_hash; /* query reference identifier */
} pgssPlanHashKey;
typedef struct pgssPlanEntry
{
pgssPlanHashKey key; /* hash key of entry - MUST BE FIRST */
PlanInfo plan_info; /* planning information */
slock_t mutex; /* protects the counters only */
} pgssPlanEntry;
typedef struct pgssHashKey
{
uint64 bucket_id; /* bucket number */
@@ -198,6 +190,7 @@ typedef struct pgssHashKey
uint64 userid; /* user OID */
uint64 dbid; /* database OID */
uint64 ip; /* client ip address */
uint64 planid; /* plan identifier */
} pgssHashKey;
typedef struct QueryInfo
@@ -263,14 +256,18 @@ typedef struct Counters
uint64 bucket_id; /* bucket id */
Calls calls;
QueryInfo info;
PlanInfo plan_info;
CallTime time;
Calls plancalls;
CallTime plantime;
PlanInfo planinfo;
Blocks blocks;
SysInfo sysinfo;
ErrorInfo error;
Wal_Usage walusage;
int plans;
Wal_Usage walusage;
int resp_calls[MAX_RESPONSE_BUCKET]; /* execution time's in msec */
uint64 state; /* query state */
} Counters;
/* Some global structure to get the cpu usage, really don't like the idea of global variable */
@@ -362,18 +359,18 @@ void pgss_shmem_shutdown(int code, Datum arg);
int pgsm_get_bucket_size(void);
pgssSharedState* pgsm_get_ss(void);
HTAB *pgsm_get_plan_hash(void);
HTAB *pgsm_get_query_hash(void);
HTAB *pgsm_get_hash(void);
HTAB *pgsm_get_plan_hash(void);
HTAB* pgsm_get_query_hash(void);
void hash_entry_reset(void);
void hash_query_entry_dealloc(int bucket);
void hash_entry_dealloc(int bucket);
pgssPlanEntry *hash_plan_entry_alloc(pgssSharedState *pgss, pgssPlanHashKey *key);
pgssEntry* hash_entry_alloc(pgssSharedState *pgss, pgssHashKey *key, int encoding);
Size hash_memsize(void);
bool hash_find_query_entry(uint64 bucket_id, uint64 queryid);
bool hash_create_query_entry(uint64 bucket_id, uint64 queryid);
pgssQueryEntry* hash_find_query_entry(uint64 bucket_id, uint64 queryid, uint64 dbid, uint64 userid, uint64 ip);
pgssQueryEntry* hash_create_query_entry(uint64 bucket_id, uint64 queryid, uint64 dbid, uint64 userid, uint64 ip);
void pgss_startup(void);
void set_qbuf(int i, unsigned char *);