mysql_exporter监控指标特别少什么原因

MySQL Exporter 监控指标少的原因可能有以下几个：

1. 未正确配置 MySQL Exporter: MySQL Exporter 需要配置正确的用户名、密码和地址才能连接到 MySQL 数据库并获取数据。如果配置不正确，可能会导致获取到少量或没有数据。

2. MySQL 数据库版本不兼容: MySQL Exporter 与 MySQL 数据库版本不兼容也可能导致监控指标特别少。在这种情况下，可以尝试升级 MySQL Exporter 或 MySQL 数据库版本。

3. MySQL Exporter 配置不正确: MySQL Exporter 需要正确的配置文件来获取监控指标，如果配置不正确，可能会导致获取到少量或没有数据。

4. MySQL 数据库中没有足够的数据: MySQL Exporter 获取的监控指标与 MySQL 数据库中存储的数据相关。如果 MySQL 数据库中没有足够的数据，可能会导致获取到少量或没有数据。

总之，如果您遇到 MySQL Exporter 监控指标特别少的情况，可以先检查是否有上述问题，进行相应的排查和处理。

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。

mysqldb_exporter 监控多个mysql 服务

要监控多个MySQL服务，可以使用docker-compose部署mysqld_exporter。在docker-compose文件中，可以定义多个mysql服务，并为每个服务指定不同的端口和环境变量。例如：

version: '3'
services:
mysql1:
image: mysql:5.7
ports:
- "3306:3306"
environment:
- MYSQL_ROOT_PASSWORD=password

mysql2:
image: mysql:5.7
ports:
- "3307:3306"
environment:
- MYSQL_ROOT_PASSWORD=password

mysqlexporter:
image: prom/mysqld-exporter
ports:
- "9104:9104"
environment:
- DATA_SOURCE_NAME=root:password@(mysql1:3306)/
- DATA_SOURCE_NAME=root:password@(mysql2:3306)/

在上面的示例中，我们定义了两个mysql服务(mysql1和mysql2)，并将它们分别映射到宿主机的不同端口(3306和3307)。然后，在mysqlexporter服务中，我们使用了两个不同的DATA_SOURCE_NAME环境变量来指定连接到不同的MySQL实例。

通过这种方式，你可以监控多个MySQL服务，并在/metrics端点查看mysql_up指标来判断每个MySQL实例是否正常连接到mysqld_exporter。当mysql_up指标的值为1时，表示能够正常获取监控数据。
#### 引用[.reference_title]
- *1* *2* *3* [prometheus监控MySQL：mysqld_exporter部署](https://blog.csdn.net/qq_37374514/article/details/129259675)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insertT0,239^v3^insert_chatgpt"}} ] [.reference_item]
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