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/* -*-pgsql-c-*- */
/*
*
* $Header$
*
* pgpool: a language independent connection pool server for PostgreSQL
* written by Tatsuo Ishii
*
* Copyright (c) 2003-2020 PgPool Global Development Group
*
*/
/*--------------------------------------------------------------------
* statistics.c
*
* Various statistics related functions.
*--------------------------------------------------------------------
*/
#include <unistd.h>
#include <string.h>
#include "pool.h"
#include "utils/statistics.h"
#include "parser/nodes.h"
/*
* Per backend node stat area in shared memory
*/
typedef struct
{
uint64 select_cnt; /* number of read SELECT queries issued */
uint64 insert_cnt; /* number of INSERT queries issued */
uint64 update_cnt; /* number of UPDATE queries issued */
uint64 delete_cnt; /* number of DELETE queries issued */
uint64 ddl_cnt; /* number of DDL queries issued */
uint64 other_cnt; /* number of any other queries issued */
uint64 panic_cnt; /* number of PANIC messages */
uint64 fatal_cnt; /* number of FATAL messages */
uint64 error_cnt; /* number of ERROR messages */
} PER_NODE_STAT;
static volatile PER_NODE_STAT *per_node_stat;
/*
* Return shared memory size necessary for this module
*/
size_t
stat_shared_memory_size(void)
{
size_t size;
/* query counter area */
size = MAXALIGN(MAX_NUM_BACKENDS * sizeof(PER_NODE_STAT));
return size;
}
/*
* Set PER_NODE_STAT address in the shared memory area to global variable.
* This should be called from pgpool main process upon startup.
*/
void
stat_set_stat_area(void *address)
{
per_node_stat = (PER_NODE_STAT *) address;
}
/*
* Initialize shared memory stat area
*/
void
stat_init_stat_area(void)
{
memset((void *) per_node_stat, 0, stat_shared_memory_size());
}
/*
* Update stat counter
*/
void
stat_count_up(int backend_node_id, Node *parse_tree)
{
if (parse_tree == NULL)
{
/*
* No parse tree. does not worth to gather statistics (internal
* queries). If we want to gather statistics for queries without
* parse tree, we could call the parser but I don't think it's worth
* the trouble.
*/
return;
}
if (IsA(parse_tree, SelectStmt))
{
per_node_stat[backend_node_id].select_cnt++;
}
else if (IsA(parse_tree, InsertStmt))
{
per_node_stat[backend_node_id].insert_cnt++;
}
else if (IsA(parse_tree, UpdateStmt))
{
per_node_stat[backend_node_id].update_cnt++;
}
else if (IsA(parse_tree, DeleteStmt))
{
per_node_stat[backend_node_id].delete_cnt++;
}
else
{
switch (nodeTag(parse_tree))
{
case (T_CheckPointStmt):
case (T_DeallocateStmt):
case (T_DiscardStmt):
case (T_ExecuteStmt):
case (T_ExplainStmt):
case (T_ListenStmt):
case (T_LoadStmt):
case (T_LockStmt):
case (T_NotifyStmt):
case (T_PrepareStmt):
case (T_TransactionStmt):
case (T_UnlistenStmt):
case (T_VacuumStmt):
case (T_VariableSetStmt):
case (T_VariableShowStmt):
per_node_stat[backend_node_id].other_cnt++;
break;
default:
per_node_stat[backend_node_id].ddl_cnt++;
}
}
}
/*
* Update error stat counter
*/
void
error_stat_count_up(int backend_node_id, char *str)
{
if (strcasecmp(str, "PANIC") == 0)
per_node_stat[backend_node_id].panic_cnt++;
else if (strcasecmp(str, "FATAL") == 0)
per_node_stat[backend_node_id].fatal_cnt++;
else if (strcasecmp(str, "ERROR") == 0)
per_node_stat[backend_node_id].error_cnt++;
}
/*
* Stat counter read functions
*/
uint64
stat_get_select_count(int backend_node_id)
{
return per_node_stat[backend_node_id].select_cnt;
}
uint64
stat_get_insert_count(int backend_node_id)
{
return per_node_stat[backend_node_id].insert_cnt;
}
uint64
stat_get_update_count(int backend_node_id)
{
return per_node_stat[backend_node_id].update_cnt;
}
uint64
stat_get_delete_count(int backend_node_id)
{
return per_node_stat[backend_node_id].delete_cnt;
}
uint64
stat_get_ddl_count(int backend_node_id)
{
return per_node_stat[backend_node_id].ddl_cnt;
}
uint64
stat_get_other_count(int backend_node_id)
{
return per_node_stat[backend_node_id].other_cnt;
}
uint64
stat_get_panic_count(int backend_node_id)
{
return per_node_stat[backend_node_id].panic_cnt;
}
uint64
stat_get_fatal_count(int backend_node_id)
{
return per_node_stat[backend_node_id].fatal_cnt;
}
uint64
stat_get_error_count(int backend_node_id)
{
return per_node_stat[backend_node_id].error_cnt;
}
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