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-rw-r--r--sql/thread_pool_info.cc364
1 files changed, 364 insertions, 0 deletions
diff --git a/sql/thread_pool_info.cc b/sql/thread_pool_info.cc
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+/* Copyright(C) 2019 MariaDB
+
+This program is free software; you can redistribute itand /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., 51 Franklin Street, Fifth Floor, Boston, MA 02111 - 1301 USA*/
+
+#include <mysql_version.h>
+
+#include <my_global.h>
+#include <mysql/plugin.h>
+#include <sql_class.h>
+#include <sql_i_s.h>
+#include <mysql/plugin.h>
+#include <sql_show.h>
+#include <threadpool_generic.h>
+
+namespace Show {
+
+static ST_FIELD_INFO groups_fields_info[] =
+{
+ Column("GROUP_ID", SLong(6), NOT_NULL),
+ Column("CONNECTIONS", SLong(6), NOT_NULL),
+ Column("THREADS", SLong(6), NOT_NULL),
+ Column("ACTIVE_THREADS", SLong(6), NOT_NULL),
+ Column("STANDBY_THREADS", SLong(6), NOT_NULL),
+ Column("QUEUE_LENGTH", SLong(6), NOT_NULL),
+ Column("HAS_LISTENER", STiny(1), NOT_NULL),
+ Column("IS_STALLED", STiny(1), NOT_NULL),
+ CEnd()
+};
+
+} // namespace Show
+
+
+static int groups_fill_table(THD* thd, TABLE_LIST* tables, COND*)
+{
+ if (!all_groups)
+ return 0;
+
+ TABLE* table = tables->table;
+ for (uint i = 0; i < threadpool_max_size && all_groups[i].pollfd != INVALID_HANDLE_VALUE; i++)
+ {
+ thread_group_t* group = &all_groups[i];
+ /* ID */
+ table->field[0]->store(i, true);
+ /* CONNECTION_COUNT */
+ table->field[1]->store(group->connection_count, true);
+ /* THREAD_COUNT */
+ table->field[2]->store(group->thread_count, true);
+ /* ACTIVE_THREAD_COUNT */
+ table->field[3]->store(group->active_thread_count, true);
+ /* STANDBY_THREAD_COUNT */
+ table->field[4]->store(group->waiting_threads.elements(), true);
+ /* QUEUE LENGTH */
+ uint queue_len = group->queues[TP_PRIORITY_LOW].elements()
+ + group->queues[TP_PRIORITY_HIGH].elements();
+ table->field[5]->store(queue_len, true);
+ /* HAS_LISTENER */
+ table->field[6]->store((longlong)(group->listener != 0), true);
+ /* IS_STALLED */
+ table->field[7]->store(group->stalled, true);
+
+ if (schema_table_store_record(thd, table))
+ return 1;
+ }
+ return 0;
+}
+
+
+static int groups_init(void* p)
+{
+ ST_SCHEMA_TABLE* schema = (ST_SCHEMA_TABLE*)p;
+ schema->fields_info = Show::groups_fields_info;
+ schema->fill_table = groups_fill_table;
+ return 0;
+}
+
+
+namespace Show {
+
+static ST_FIELD_INFO queues_field_info[] =
+{
+ Column("GROUP_ID", SLong(6), NOT_NULL),
+ Column("POSITION", SLong(6), NOT_NULL),
+ Column("PRIORITY", SLong(1), NOT_NULL),
+ Column("CONNECTION_ID", ULonglong(19), NULLABLE),
+ Column("QUEUEING_TIME_MICROSECONDS", SLonglong(19), NOT_NULL),
+ CEnd()
+};
+
+} // namespace Show
+
+typedef connection_queue_t::Iterator connection_queue_iterator;
+
+static int queues_fill_table(THD* thd, TABLE_LIST* tables, COND*)
+{
+ if (!all_groups)
+ return 0;
+
+ TABLE* table = tables->table;
+ for (uint group_id = 0;
+ group_id < threadpool_max_size && all_groups[group_id].pollfd != INVALID_HANDLE_VALUE;
+ group_id++)
+ {
+ thread_group_t* group = &all_groups[group_id];
+
+ mysql_mutex_lock(&group->mutex);
+ bool err = false;
+ int pos = 0;
+ ulonglong now = microsecond_interval_timer();
+ for (uint prio = 0; prio < NQUEUES && !err; prio++)
+ {
+ connection_queue_iterator it(group->queues[prio]);
+ TP_connection_generic* c;
+ while ((c = it++) != 0)
+ {
+ /* GROUP_ID */
+ table->field[0]->store(group_id, true);
+ /* POSITION */
+ table->field[1]->store(pos++, true);
+ /* PRIORITY */
+ table->field[2]->store(prio, true);
+ /* CONNECTION_ID */
+ if (c->thd)
+ {
+ table->field[3]->set_notnull();
+ table->field[3]->store(c->thd->thread_id, true);
+ }
+ /* QUEUEING_TIME */
+ table->field[4]->store(now - c->enqueue_time, true);
+
+ err = schema_table_store_record(thd, table);
+ if (err)
+ break;
+ }
+ }
+ mysql_mutex_unlock(&group->mutex);
+ if (err)
+ return 1;
+ }
+ return 0;
+}
+
+static int queues_init(void* p)
+{
+ ST_SCHEMA_TABLE* schema = (ST_SCHEMA_TABLE*)p;
+ schema->fields_info = Show::queues_field_info;
+ schema->fill_table = queues_fill_table;
+ return 0;
+}
+
+namespace Show {
+
+static ST_FIELD_INFO stats_fields_info[] =
+{
+ Column("GROUP_ID", SLong(6), NOT_NULL),
+ Column("THREAD_CREATIONS", SLonglong(19), NOT_NULL),
+ Column("THREAD_CREATIONS_DUE_TO_STALL", SLonglong(19), NOT_NULL),
+ Column("WAKES", SLonglong(19), NOT_NULL),
+ Column("WAKES_DUE_TO_STALL", SLonglong(19), NOT_NULL),
+ Column("THROTTLES", SLonglong(19), NOT_NULL),
+ Column("STALLS", SLonglong(19), NOT_NULL),
+ Column("POLLS_BY_LISTENER", SLonglong(19), NOT_NULL),
+ Column("POLLS_BY_WORKER", SLonglong(19), NOT_NULL),
+ Column("DEQUEUES_BY_LISTENER", SLonglong(19), NOT_NULL),
+ Column("DEQUEUES_BY_WORKER", SLonglong(19), NOT_NULL),
+ CEnd()
+};
+
+} // namespace Show
+
+
+static int stats_fill_table(THD* thd, TABLE_LIST* tables, COND*)
+{
+ if (!all_groups)
+ return 0;
+
+ TABLE* table = tables->table;
+ for (uint i = 0; i < threadpool_max_size && all_groups[i].pollfd != INVALID_HANDLE_VALUE; i++)
+ {
+ table->field[0]->store(i, true);
+ thread_group_t* group = &all_groups[i];
+
+ mysql_mutex_lock(&group->mutex);
+ thread_group_counters_t* counters = &group->counters;
+ table->field[1]->store(counters->thread_creations, true);
+ table->field[2]->store(counters->thread_creations_due_to_stall, true);
+ table->field[3]->store(counters->wakes, true);
+ table->field[4]->store(counters->wakes_due_to_stall, true);
+ table->field[5]->store(counters->throttles, true);
+ table->field[6]->store(counters->stalls, true);
+ table->field[7]->store(counters->polls[(int)operation_origin::LISTENER], true);
+ table->field[8]->store(counters->polls[(int)operation_origin::WORKER], true);
+ table->field[9]->store(counters->dequeues[(int)operation_origin::LISTENER], true);
+ table->field[10]->store(counters->dequeues[(int)operation_origin::WORKER], true);
+ mysql_mutex_unlock(&group->mutex);
+ if (schema_table_store_record(thd, table))
+ return 1;
+ }
+ return 0;
+}
+
+static int stats_reset_table()
+{
+ if (!all_groups)
+ return 0;
+
+ for (uint i = 0; i < threadpool_max_size && all_groups[i].pollfd != INVALID_HANDLE_VALUE; i++)
+ {
+ thread_group_t* group = &all_groups[i];
+ mysql_mutex_lock(&group->mutex);
+ memset(&group->counters, 0, sizeof(group->counters));
+ mysql_mutex_unlock(&group->mutex);
+ }
+ return 0;
+}
+
+static int stats_init(void* p)
+{
+ ST_SCHEMA_TABLE* schema = (ST_SCHEMA_TABLE*)p;
+ schema->fields_info = Show::stats_fields_info;
+ schema->fill_table = stats_fill_table;
+ schema->reset_table = stats_reset_table;
+ return 0;
+}
+
+
+namespace Show {
+
+static ST_FIELD_INFO waits_fields_info[] =
+{
+ Column("REASON", Varchar(16), NOT_NULL),
+ Column("COUNT", SLonglong(19), NOT_NULL),
+ CEnd()
+};
+
+} // namespace Show
+
+/* See thd_wait_type enum for explanation*/
+static const LEX_CSTRING wait_reasons[THD_WAIT_LAST] =
+{
+ {STRING_WITH_LEN("UNKNOWN")},
+ {STRING_WITH_LEN("SLEEP")},
+ {STRING_WITH_LEN("DISKIO")},
+ {STRING_WITH_LEN("ROW_LOCK")},
+ {STRING_WITH_LEN("GLOBAL_LOCK")},
+ {STRING_WITH_LEN("META_DATA_LOCK")},
+ {STRING_WITH_LEN("TABLE_LOCK")},
+ {STRING_WITH_LEN("USER_LOCK")},
+ {STRING_WITH_LEN("BINLOG")},
+ {STRING_WITH_LEN("GROUP_COMMIT")},
+ {STRING_WITH_LEN("SYNC")},
+ {STRING_WITH_LEN("NET")}
+};
+
+extern Atomic_counter<unsigned long long> tp_waits[THD_WAIT_LAST];
+
+static int waits_fill_table(THD* thd, TABLE_LIST* tables, COND*)
+{
+ if (!all_groups)
+ return 0;
+
+ TABLE* table = tables->table;
+ for (auto i = 0; i < THD_WAIT_LAST; i++)
+ {
+ table->field[0]->store(wait_reasons[i].str, wait_reasons[i].length, system_charset_info);
+ table->field[1]->store(tp_waits[i], true);
+ if (schema_table_store_record(thd, table))
+ return 1;
+ }
+ return 0;
+}
+
+static int waits_reset_table()
+{
+ for (auto i = 0; i < THD_WAIT_LAST; i++)
+ tp_waits[i] = 0;
+
+ return 0;
+}
+
+static int waits_init(void* p)
+{
+ ST_SCHEMA_TABLE* schema = (ST_SCHEMA_TABLE*)p;
+ schema->fields_info = Show::waits_fields_info;
+ schema->fill_table = waits_fill_table;
+ schema->reset_table = waits_reset_table;
+ return 0;
+}
+
+static struct st_mysql_information_schema plugin_descriptor =
+{ MYSQL_INFORMATION_SCHEMA_INTERFACE_VERSION };
+
+maria_declare_plugin(thread_pool_info)
+{
+ MYSQL_INFORMATION_SCHEMA_PLUGIN,
+ &plugin_descriptor,
+ "THREAD_POOL_GROUPS",
+ "Vladislav Vaintroub",
+ "Provides information about threadpool groups.",
+ PLUGIN_LICENSE_GPL,
+ groups_init,
+ 0,
+ 0x0100,
+ NULL,
+ NULL,
+ "1.0",
+ MariaDB_PLUGIN_MATURITY_STABLE
+},
+{
+ MYSQL_INFORMATION_SCHEMA_PLUGIN,
+ &plugin_descriptor,
+ "THREAD_POOL_QUEUES",
+ "Vladislav Vaintroub",
+ "Provides information about threadpool queues.",
+ PLUGIN_LICENSE_GPL,
+ queues_init,
+ 0,
+ 0x0100,
+ NULL,
+ NULL,
+ "1.0",
+ MariaDB_PLUGIN_MATURITY_STABLE
+},
+{
+ MYSQL_INFORMATION_SCHEMA_PLUGIN,
+ &plugin_descriptor,
+ "THREAD_POOL_STATS",
+ "Vladislav Vaintroub",
+ "Provides performance counter information for threadpool.",
+ PLUGIN_LICENSE_GPL,
+ stats_init,
+ 0,
+ 0x0100,
+ NULL,
+ NULL,
+ "1.0",
+ MariaDB_PLUGIN_MATURITY_STABLE
+},
+{
+ MYSQL_INFORMATION_SCHEMA_PLUGIN,
+ &plugin_descriptor,
+ "THREAD_POOL_WAITS",
+ "Vladislav Vaintroub",
+ "Provides wait counters for threadpool.",
+ PLUGIN_LICENSE_GPL,
+ waits_init,
+ 0,
+ 0x0100,
+ NULL,
+ NULL,
+ "1.0",
+ MariaDB_PLUGIN_MATURITY_STABLE
+}
+maria_declare_plugin_end;