REASON_FLUSHED

根据提供的引用内容，REASON_FLUSHED可能是一个错误信息中的关键词。但是，这个关键词并没有提供足够的上下文来确定它的含义。可以推测这个错误信息可能与UITableView的数据源有关，因为它提到了“UITableView dataSource returned a nil cell for row at index path”。这个错误信息通常表示UITableView的数据源返回了一个空的单元格，导致应用程序崩溃。如果你想更深入地了解这个错误信息，你需要查看更多的代码和上下文信息。

相关问题

mysqld_exporter监控指标列表

MySQL Exporter 是一个监控 MySQL 数据库的工具，可以将 MySQL 的监控指标暴露为 Prometheus 可以抓取的格式。以下是 MySQL Exporter 可以监控的指标列表：

- mysql_active_threads
- mysql_bytes_received
- mysql_bytes_sent
- mysql_commands_total
- mysql_connections_aborted
- mysql_connections_total
- mysql_created_tmp_disk_tables
- mysql_created_tmp_files
- mysql_created_tmp_tables
- mysql_flush_commands
- mysql_innodb_active_transactions
- mysql_innodb_buffer_pool_bytes_data
- mysql_innodb_buffer_pool_bytes_dirty
- mysql_innodb_buffer_pool_pages_data
- mysql_innodb_buffer_pool_pages_dirty
- mysql_innodb_buffer_pool_pages_flushed
- mysql_innodb_buffer_pool_pages_free
- mysql_innodb_buffer_pool_pages_misc
- mysql_innodb_buffer_pool_pages_total
- mysql_innodb_buffer_pool_read_ahead
- mysql_innodb_buffer_pool_read_ahead_evicted
- mysql_innodb_buffer_pool_read_requests
- mysql_innodb_buffer_pool_reads
- mysql_innodb_buffer_pool_wait_free
- mysql_innodb_buffer_pool_write_requests
- mysql_innodb_checkpoint_age
- mysql_innodb_current_row_locks
- mysql_innodb_data_fsyncs
- mysql_innodb_data_pending_fsyncs
- mysql_innodb_data_pending_reads
- mysql_innodb_data_pending_writes
- mysql_innodb_data_read
- mysql_innodb_data_reads
- mysql_innodb_data_written
- mysql_innodb_dblwr_pages_written
- mysql_innodb_dblwr_writes
- mysql_innodb_deadlocks
- mysql_innodb_history_list_length
- mysql_innodb_ibuf_free_list
- mysql_innodb_ibuf_merged
- mysql_innodb_ibuf_merges
- mysql_innodb_ibuf_size
- mysql_innodb_log_waits
- mysql_innodb_log_write_requests
- mysql_innodb_log_writes
- mysql_innodb_lsn_current
- mysql_innodb_lsn_flushed
- mysql_innodb_lsn_last_checkpoint
- mysql_innodb_mem_adaptive_hash
- mysql_innodb_mem_dictionary
- mysql_innodb_mem_total
- mysql_innodb_mutex_os_waits
- mysql_innodb_mutex_spin_rounds
- mysql_innodb_mutex_spin_waits
- mysql_innodb_num_open_files
- mysql_innodb_num_open_files_hist
- mysql_innodb_os_log_fsyncs
- mysql_innodb_os_log_pending_fsyncs
- mysql_innodb_os_log_pending_writes
- mysql_innodb_os_log_written
- mysql_innodb_pages_created
- mysql_innodb_pages_read
- mysql_innodb_pages_written
- mysql_innodb_pending_aio_log_ios
- mysql_innodb_pending_aio_sync_ios
- mysql_innodb_pending_buffer_pool_flushes
- mysql_innodb_pending_checkpoint_writes
- mysql_innodb_pending_ibuf_aio_reads
- mysql_innodb_pending_log_flushes
- mysql_innodb_pending_log_writes
- mysql_innodb_pending_normal_aio_reads
- mysql_innodb_pending_normal_aio_writes
- mysql_innodb_queries_inside
- mysql_innodb_queries_queued
- mysql_innodb_read_views
- mysql_innodb_rows_deleted
- mysql_innodb_rows_inserted
- mysql_innodb_rows_read
- mysql_innodb_rows_updated
- mysql_innodb_s_lock_os_waits
- mysql_innodb_s_lock_spin_rounds
- mysql_innodb_s_lock_spin_waits
- mysql_innodb_sem_waits
- mysql_innodb_sem_wait_time_ms
- mysql_innodb_tables_in_use
- mysql_innodb_x_lock_os_waits
- mysql_innodb_x_lock_spin_rounds
- mysql_innodb_x_lock_spin_waits
- mysql_max_used_connections
- mysql_open_files
- mysql_open_streams
- mysql_open_tables
- mysql_opened_tables
- mysql_prepared_stmt_count
- mysql_qcache_free_blocks
- mysql_qcache_free_memory
- mysql_qcache_hits
- mysql_qcache_inserts
- mysql_qcache_lowmem_prunes
- mysql_qcache_not_cached
- mysql_qcache_queries_in_cache
- mysql_qcache_total_blocks
- mysql_queries
- mysql_questions
- mysql_select_full_join
- mysql_select_full_range_join
- mysql_select_range
- mysql_select_range_check
- mysql_select_scan
- mysql_slave_lag_seconds
- mysql_slow_queries
- mysql_sort_merge_passes
- mysql_sort_range
- mysql_sort_rows
- mysql_sort_scan
- mysql_table_locks_immediate
- mysql_table_locks_waited
- mysql_table_open_cache_hits
- mysql_table_open_cache_misses
- mysql_table_open_cache_overflows
- mysql_threadpool_idle_threads
- mysql_threadpool_threads
- mysql_threads_cached
- mysql_threads_connected
- mysql_threads_created
- mysql_threads_running

上述指标可以帮助你监控 MySQL 数据库的性能和状态，例如连接数、查询数、缓存命中率、锁等待情况、InnoDB 的缓存和 IO 操作等。

通过重写实现class CarWin :public CWinBase { public: CarWin(int x = 0, int y = 0, int w = 0, int h = 0); ~CarWin(); int doAction();//按钮分发：不同的按钮执行不同的业务 private: CLabel *title, *license_plate_lab, *total_lab, *remainder_lab; CEdit *license_plate_edit, *information_edit, *total_edit, *remainder_edit; CButt *query_btu, *storage_btu, *outbound_btu, *flushed_btu, *return_btu; };调用class CStorageWin :public CWinBase { public: CStorageWin(int x = 0, int y = 0, int w = 0, int h = 0); ~CStorageWin(); int doAction();//按钮分发：不同的按钮执行不同的业务 private: CLabel *title, *cpn_lab;//cpn=License plate number(车牌号) CEdit *cpn_edit; CButt *login_btu, *reg_btu; };里面的cpn_edit

重写的内容应该是在类中定义成员变量和成员函数，并且在构造函数中初始化这些成员变量和控件。在CarWin类中，成员变量包括title、license_plate_lab、total_lab、remainder_lab、license_plate_edit、information_edit、total_edit、remainder_edit、query_btu、storage_btu、outbound_btu、flushed_btu、return_btu；成员函数包括doAction()。在CStorageWin类中，成员变量包括title、cpn_lab、cpn_edit、login_btu、reg_btu；成员函数包括doAction()。

在CarWin的构造函数中，应该初始化这些成员变量和控件。例如：

CarWin::CarWin(int x, int y, int w, int h) : CWinBase(x, y, w, h) {
title = new CLabel("Car Management System", 20, 20, 200, 30, this);
license_plate_lab = new CLabel("License plate number:", 20, 60, 150, 20, this);
license_plate_edit = new CEdit("", 170, 60, 150, 20, this);
//...
query_btu = new CButt("Query", 20, 200, 80, 30, this);
storage_btu = new CButt("Storage", 100, 200, 80, 30, this);
outbound_btu = new CButt("Outbound", 180, 200, 80, 30, this);
flushed_btu = new CButt("Flushed", 260, 200, 80, 30, this);
return_btu = new CButt("Return", 340, 200, 80, 30, this);
}

在CStorageWin的构造函数中也应该进行类似的初始化。例如：

CStorageWin::CStorageWin(int x, int y, int w, int h) : CWinBase(x, y, w, h) {
title = new CLabel("Login/Register", 20, 20, 200, 30, this);
cpn_lab = new CLabel("License plate number:", 20, 60, 150, 20, this);
cpn_edit = new CEdit("", 170, 60, 150, 20, this);
//...
login_btu = new CButt("Login", 20, 120, 80, 30, this);
reg_btu = new CButt("Register", 100, 120, 80, 30, this);
}

在doAction()函数中，根据不同的按钮执行不同的业务，例如：

int CarWin::doAction() {
if (query_btu->isClicked()) {
//执行查询操作
return 1;
} else if (storage_btu->isClicked()) {
//执行入库操作
return 2;
} else if (outbound_btu->isClicked()) {
//执行出库操作
return 3;
} else if (flushed_btu->isClicked()) {
//执行冲账操作
return 4;
} else if (return_btu->isClicked()) {
//执行返回操作
return 5;
}
return 0;
}

在CStorageWin中的doAction()函数也应该类似。至于cpn_edit，是CStorageWin类的一个成员变量，可以在doAction()函数中使用，例如：

int CStorageWin::doAction() {
if (login_btu->isClicked()) {
//获取cpn_edit的内容并进行登录操作
string cpn = cpn_edit->getText();
//...
return 1;
} else if (reg_btu->isClicked()) {
//获取cpn_edit的内容并进行注册操作
string cpn = cpn_edit->getText();
//...
return 2;
}
return 0;
}