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7468ccfadf
commit d1bb19b8f751875472211312c8e810143a7ba4b6
Author: Manuel Ung <mung@fb.com>
Date: Fri Feb 3 11:50:34 2017 -0800
Add cardinality stats to information schema
Summary: This adds cardinality stats to the INFORMATION_SCHEMA.ROCKSDB_INDEX_FILE_MAP table. This is the only missing user collected properties from SST files that we don't expose, which is useful for debugging cardinality bugs.
Reviewed By: hermanlee
Differential Revision: D4509156
fbshipit-source-id: 2d3918a
87 lines
2.7 KiB
C++
87 lines
2.7 KiB
C++
/*
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Portions Copyright (c) 2015-Present, Facebook, Inc.
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Portions Copyright (c) 2012, Monty Program Ab
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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#ifdef USE_PRAGMA_IMPLEMENTATION
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#pragma implementation // gcc: Class implementation
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#endif
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/* The C++ file's header */
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#include "./rdb_threads.h"
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namespace myrocks {
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void *Rdb_thread::thread_func(void *const thread_ptr) {
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DBUG_ASSERT(thread_ptr != nullptr);
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Rdb_thread *const thread = static_cast<Rdb_thread *const>(thread_ptr);
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if (!thread->m_run_once.exchange(true)) {
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thread->run();
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thread->uninit();
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}
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return nullptr;
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}
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void Rdb_thread::init(
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#ifdef HAVE_PSI_INTERFACE
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my_core::PSI_mutex_key stop_bg_psi_mutex_key,
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my_core::PSI_cond_key stop_bg_psi_cond_key
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#endif
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) {
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DBUG_ASSERT(!m_run_once);
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mysql_mutex_init(stop_bg_psi_mutex_key, &m_signal_mutex, MY_MUTEX_INIT_FAST);
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mysql_cond_init(stop_bg_psi_cond_key, &m_signal_cond, nullptr);
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}
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void Rdb_thread::uninit() {
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mysql_mutex_destroy(&m_signal_mutex);
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mysql_cond_destroy(&m_signal_cond);
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}
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int Rdb_thread::create_thread(const std::string &thread_name
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#ifdef HAVE_PSI_INTERFACE
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,
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PSI_thread_key background_psi_thread_key
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#endif
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) {
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DBUG_ASSERT(!thread_name.empty());
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int err = mysql_thread_create(background_psi_thread_key, &m_handle, nullptr,
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thread_func, this);
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if (!err) {
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/*
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mysql_thread_create() ends up doing some work underneath and setting the
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thread name as "my-func". This isn't what we want. Our intent is to name
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the threads according to their purpose so that when displayed under the
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debugger then they'll be more easily identifiable. Therefore we'll reset
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the name if thread was successfully created.
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*/
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err = pthread_setname_np(m_handle, thread_name.c_str());
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}
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return err;
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}
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void Rdb_thread::signal(const bool &stop_thread) {
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mysql_mutex_lock(&m_signal_mutex);
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if (stop_thread) {
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m_stop = true;
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}
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mysql_cond_signal(&m_signal_cond);
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mysql_mutex_unlock(&m_signal_mutex);
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}
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} // namespace myrocks
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