mirror of
https://github.com/MariaDB/server.git
synced 2025-01-19 13:32:33 +01:00
445e518bc7
commit f8f364b47f2784f16b401f27658f1c16eaf348ec
Author: Jay Edgar <jkedgar@fb.com>
Date: Tue Oct 17 15:19:31 2017 -0700
Add a hashed, hierarchical, wheel timer implementation
Summary:
In order to implement idle timeouts on detached sessions we need something inside MySQL that is lightweight and can handle calling events in the future with very little cost for cancelling or resetting the event. A hashed, hi
By default the timers are grouped into 10ms buckets (the 'hashed' part), though the size of the buckets is configurable at the creation of the timer. Each wheel (the 'wheel' part) maintains 256 buckets and cascades to the whe
Reviewed By: djwatson
Differential Revision: D6199806
fbshipit-source-id: 5e1590f
57 lines
1.9 KiB
C++
57 lines
1.9 KiB
C++
/* Copyright (c) 2017, Percona and/or its affiliates. All rights reserved.
|
|
|
|
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
|
|
#pragma once
|
|
|
|
#ifndef _rdb_psi_h_
|
|
#define _rdb_psi_h_
|
|
|
|
/* MySQL header files */
|
|
#include <my_global.h>
|
|
#include <my_pthread.h>
|
|
#include <mysql/psi/psi.h>
|
|
|
|
/* MyRocks header files */
|
|
#include "./rdb_utils.h"
|
|
|
|
namespace myrocks {
|
|
|
|
/*
|
|
The following is needed as an argument for mysql_stage_register,
|
|
irrespectively of whether we're compiling with P_S or not.
|
|
*/
|
|
extern my_core::PSI_stage_info stage_waiting_on_row_lock;
|
|
|
|
#ifdef HAVE_PSI_INTERFACE
|
|
extern my_core::PSI_thread_key rdb_background_psi_thread_key,
|
|
rdb_drop_idx_psi_thread_key;
|
|
|
|
extern my_core::PSI_mutex_key rdb_psi_open_tbls_mutex_key,
|
|
rdb_signal_bg_psi_mutex_key, rdb_signal_drop_idx_psi_mutex_key,
|
|
rdb_collation_data_mutex_key, rdb_mem_cmp_space_mutex_key,
|
|
key_mutex_tx_list, rdb_sysvars_psi_mutex_key, rdb_cfm_mutex_key,
|
|
rdb_sst_commit_key;
|
|
|
|
extern my_core::PSI_rwlock_key key_rwlock_collation_exception_list,
|
|
key_rwlock_read_free_rpl_tables, key_rwlock_skip_unique_check_tables;
|
|
|
|
extern my_core::PSI_cond_key rdb_signal_bg_psi_cond_key,
|
|
rdb_signal_drop_idx_psi_cond_key;
|
|
#endif // HAVE_PSI_INTERFACE
|
|
|
|
void init_rocksdb_psi_keys();
|
|
|
|
} // namespace myrocks
|
|
|
|
#endif // _rdb_psi_h_
|