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MDEV-4568 - Port Percona response time distribution as audit plugin

Browse source 
sql/sp_head.cc:
  Trigger MYSQL_AUDIT_GENERAL_STATUS event for each statement in stored
  procedures. Not strictly needed for query_response_time plugin, but
  makes it behave more like Percona patch.
This commit is contained in:
Sergey Vojtovich 2013-06-04 10:01:31 +04:00
commit afd134e212
16 changed files with 2122 additions and 1 deletions
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plugin/query_response_time/plugin.cc Normal file
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/* Copyright (C) 2013 Percona and Sergey Vojtovich
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#define MYSQL_SERVER
#include <sql_class.h>
#include <table.h>
#include <sql_show.h>
#include <mysql/plugin_audit.h>
#include "query_response_time.h"
ulong opt_query_response_time_range_base= QRT_DEFAULT_BASE;
my_bool opt_query_response_time_stats= 0;
static my_bool opt_query_response_time_flush= 0;
static void query_response_time_flush_update(
MYSQL_THD thd __attribute__((unused)),
struct st_mysql_sys_var *var __attribute__((unused)),
void *tgt __attribute__((unused)),
const void *save __attribute__((unused)))
{
query_response_time_flush();
}
static MYSQL_SYSVAR_ULONG(range_base, opt_query_response_time_range_base,
PLUGIN_VAR_RQCMDARG,
"Select base of log for query_response_time ranges. WARNING: variable "
"change affect only after flush",
NULL, NULL, QRT_DEFAULT_BASE, 2, QRT_MAXIMUM_BASE, 1);
static MYSQL_SYSVAR_BOOL(stats, opt_query_response_time_stats,
PLUGIN_VAR_OPCMDARG,
"Enable or disable query response time statisics collecting",
NULL, NULL, FALSE);
static MYSQL_SYSVAR_BOOL(flush, opt_query_response_time_flush,
PLUGIN_VAR_NOCMDOPT,
"Update of this variable flushes statistics and re-reads "
"query_response_time_range_base",
NULL, query_response_time_flush_update, FALSE);
#ifndef DBUG_OFF
static MYSQL_THDVAR_ULONGLONG(exec_time_debug, PLUGIN_VAR_NOCMDOPT,
"Pretend queries take this many microseconds. When 0 (the default) use "
"the actual execution time. Used only for debugging.",
NULL, NULL, 0, 0, LONG_TIMEOUT, 1);
#endif
static struct st_mysql_sys_var *query_response_time_info_vars[]=
{
MYSQL_SYSVAR(range_base),
MYSQL_SYSVAR(stats),
MYSQL_SYSVAR(flush),
#ifndef DBUG_OFF
MYSQL_SYSVAR(exec_time_debug),
#endif
NULL
};
ST_FIELD_INFO query_response_time_fields_info[] =
{
{ "TIME", QRT_TIME_STRING_LENGTH, MYSQL_TYPE_STRING, 0, 0, "", SKIP_OPEN_TABLE },
{ "COUNT", MY_INT32_NUM_DECIMAL_DIGITS, MYSQL_TYPE_LONG, 0, MY_I_S_UNSIGNED, "", SKIP_OPEN_TABLE },
{ "TOTAL", QRT_TIME_STRING_LENGTH, MYSQL_TYPE_STRING, 0, 0, "", SKIP_OPEN_TABLE },
{ 0, 0, MYSQL_TYPE_NULL, 0, 0, 0, 0 }
};
static int query_response_time_info_init(void *p)
{
ST_SCHEMA_TABLE *i_s_query_response_time= (ST_SCHEMA_TABLE *) p;
i_s_query_response_time->fields_info= query_response_time_fields_info;
i_s_query_response_time->fill_table= query_response_time_fill;
query_response_time_init();
return 0;
}
static int query_response_time_info_deinit(void *arg __attribute__((unused)))
{
opt_query_response_time_stats= 0;
query_response_time_free();
return 0;
}
static struct st_mysql_information_schema query_response_time_info_descriptor=
{ MYSQL_INFORMATION_SCHEMA_INTERFACE_VERSION };
static void query_response_time_audit_notify(MYSQL_THD thd,
unsigned int event_class,
const void *event)
{
const struct mysql_event_general *event_general=
(const struct mysql_event_general *) event;
DBUG_ASSERT(event_class == MYSQL_AUDIT_GENERAL_CLASS);
if (event_general->event_subclass == MYSQL_AUDIT_GENERAL_STATUS &&
opt_query_response_time_stats)
{
#ifndef DBUG_OFF
if (THDVAR(thd, exec_time_debug))
query_response_time_collect(thd->lex->sql_command != SQLCOM_SET_OPTION ?
THDVAR(thd, exec_time_debug) : 0);
else
#endif
query_response_time_collect(thd->utime_after_query - thd->utime_after_lock);
}
}
static struct st_mysql_audit query_response_time_audit_descriptor=
{
MYSQL_AUDIT_INTERFACE_VERSION, NULL, query_response_time_audit_notify,
{ (unsigned long) MYSQL_AUDIT_GENERAL_CLASSMASK }
};
maria_declare_plugin(query_response_time)
{
MYSQL_INFORMATION_SCHEMA_PLUGIN,
&query_response_time_info_descriptor,
"QUERY_RESPONSE_TIME",
"Percona and Sergey Vojtovich",
"Query Response Time Distribution INFORMATION_SCHEMA Plugin",
PLUGIN_LICENSE_GPL,
query_response_time_info_init,
query_response_time_info_deinit,
0x0100,
NULL,
query_response_time_info_vars,
"1.0",
MariaDB_PLUGIN_MATURITY_ALPHA
},
{
MYSQL_AUDIT_PLUGIN,
&query_response_time_audit_descriptor,
"QUERY_RESPONSE_TIME_AUDIT",
"Percona and Sergey Vojtovich",
"Query Response Time Distribution Audit Plugin",
PLUGIN_LICENSE_GPL,
NULL,
NULL,
0x0100,
NULL,
NULL,
"1.0",
MariaDB_PLUGIN_MATURITY_ALPHA
}
maria_declare_plugin_end;