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Change Last_query_cost status variable from global to thread-local.

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sergefp@mysql.com
2005-05-18 05:39:10 +02:00
parent 25cf90edbd
commit b6179919f3
6 changed files with 6 additions and 5 deletions
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1
sql/mysql_priv.h
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@ -1048,7 +1048,6 @@ extern char language[FN_REFLEN], reg_ext[FN_EXTLEN];
extern char glob_hostname[FN_REFLEN], mysql_home[FN_REFLEN];
extern char pidfile_name[FN_REFLEN], system_time_zone[30], *opt_init_file;
extern char log_error_file[FN_REFLEN], *opt_tc_log_file;
extern double last_query_cost;
extern double log_10[32];
extern ulonglong log_10_int[20];
extern ulonglong keybuff_size;

3
sql/mysqld.cc
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@ -345,7 +345,6 @@ ulong expire_logs_days = 0;
ulong rpl_recovery_rank=0;
ulong my_bind_addr; /* the address we bind to */
volatile ulong cached_thread_count= 0;
double last_query_cost= -1; /* -1 denotes that no query was compiled yet */
double log_10[32]; /* 10 potences */
time_t start_time;
@ -5714,7 +5713,7 @@ struct show_var_st status_vars[]= {
{"Key_reads", (char*) &dflt_key_cache_var.global_cache_read, SHOW_KEY_CACHE_LONG},
{"Key_write_requests", (char*) &dflt_key_cache_var.global_cache_w_requests, SHOW_KEY_CACHE_LONG},
{"Key_writes", (char*) &dflt_key_cache_var.global_cache_write, SHOW_KEY_CACHE_LONG},
{"Last_query_cost", (char*) &last_query_cost, SHOW_DOUBLE},
{"Last_query_cost", (char*) offsetof(STATUS_VAR, last_query_cost), SHOW_DOUBLE},
{"Max_used_connections", (char*) &max_used_connections, SHOW_LONG},
#ifdef HAVE_NDBCLUSTER_DB
{"Ndb_", (char*) &ndb_status_variables, SHOW_VARS},

1
sql/sql_class.cc
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@ -444,6 +444,7 @@ void add_to_status(STATUS_VAR *to_var, STATUS_VAR *from_var)
while (to != end)
*(to++)+= *(from++);
/* it doesn't make sense to add last_query_cost values */
}

2
sql/sql_class.h
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@ -635,6 +635,8 @@ typedef struct system_status_var
ulong filesort_range_count;
ulong filesort_rows;
ulong filesort_scan_count;
double last_query_cost;
} STATUS_VAR;
/*

3
sql/sql_select.cc
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@ -3739,8 +3739,7 @@ choose_plan(JOIN *join, table_map join_tables)
Don't update last_query_cost for 'show status' command
*/
if (join->thd->lex->orig_sql_command != SQLCOM_SHOW_STATUS)
last_query_cost= join->best_read;
join->thd->status_var.last_query_cost= join->best_read;
DBUG_VOID_RETURN;
}

1
sql/sql_show.cc
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@ -1358,6 +1358,7 @@ static bool show_status_array(THD *thd, const char *wild,
}
case SHOW_DOUBLE:
{
value= ((char *) status_var + (ulong) value);
end= buff + sprintf(buff, "%f", *(double*) value);
break;
}