InnoDB Status Variables

Status variables that provide information about the InnoDB storage engine.

Variable Name	Variable Type	Variable Scope
Innodb_buffer_pool_LRU_search_scanned	Numeric	Global
Innodb_buffer_pool_LRU_unzip_search_scanned	Numeric	Global
Innodb_buffer_pool_LRU_get_free_search	Numeric	Global
Innodb_buffer_pool_flush_LRU_batch_scanned	Numeric	Global
Innodb_buffer_pool_flush_LRU_page_count	Numeric	Global
Innodb_buffer_pool_flush_adaptive_pages	Numeric	Global
Innodb_buffer_pool_flush_anticipatory_pages	Numeric	Global
Innodb_buffer_pool_flush_background_pages	Numeric	Global
Innodb_buffer_pool_flush_batch_scanned	Numeric	Global
Innodb_buffer_pool_flush_max_dirty_pages	Numeric	Global
Innodb_buffer_pool_flush_neighbor_pages	Numeric	Global
Innodb_buffer_pool_flush_sync_page	Numeric	Global
Innodb_buffer_pool_flush_async_page	Numeric	Global
Innodb_corrupted_page_reads	Numeric	Global
Innodb_corrupted_table_opens	Numeric	Global
Innodb_files_open	Numeric	Global
Innodb_files_opened	Numeric	Global
Innodb_files_closed	Numeric	Global
Innodb_files_flushed	Numeric	Global
Innodb_ibuf_discarded_delete_marks	Numeric	Global
Innodb_ibuf_discarded_deletes	Numeric	Global
Innodb_ibuf_discarded_inserts	Numeric	Global
Innodb_ibuf_merged_delete_marks	Numeric	Global
Innodb_ibuf_merged_deletes	Numeric	Global
Innodb_ibuf_merged_inserts	Numeric	Global
Innodb_ibuf_merged_pages	Numeric	Global
Innodb_ibuf_pages	Numeric	Global
Innodb_lock_deadlocks	Numeric	Global
Innodb_lsn_current	Numeric	Global
Innodb_lsn_flushed	Numeric	Global
Innodb_lsn_checkpoint	Numeric	Global
Innodb_mysql_master_log_file	String	Global
Innodb_mysql_master_log_pos	Numeric	Global
Innodb_page_discard	Numeric	Global
Innodb_page_merges	Numeric	Global
Innodb_page_merges_succeeded	Numeric	Global
Innodb_page_reorganizes	Numeric	Global
Innodb_page_splits	Numeric	Global
Innodb_purge_trx_no	Numeric	Global
Innodb_purge_undo_no	Numeric	Global
Innodb_rows_search_btree_index	Numeric	Global
Innodb_rows_search_hash_index	Numeric	Global
Innodb_semaphore_stalls	Numeric	Global
Innodb_tablespace_files_open	Numeric	Global
Innodb_tablespace_files_opened	Numeric	Global
Innodb_tablespace_files_closed	Numeric	Global
Innodb_trx_max_id	Numeric	Global
Innodb_thread_concurrency_active	Numeric	Global
Innodb_thread_concurrency_waiting	Numeric	Global

• Innodb_buffer_pool_LRU_search_scanned

  Number of pages scanned as part of LRU search.

• Innodb_buffer_pool_LRU_unzip_search_scanned

  Number of pages scanned as part of LRU unzip search.

• Innodb_buffer_pool_LRU_get_free_search

  Number of searches performed for a clean page.

• Innodb_buffer_pool_flush_LRU_batch_scanned

  Number of pages scanned as part of LRU batches.

• Innodb_buffer_pool_flush_LRU_page_count

  Number of pages flushed as part of LRU batches.

• Innodb_buffer_pool_flush_adaptive_pages

  Number of pages flushed as part of adaptive batches.

• Innodb_buffer_pool_flush_anticipatory_pages

  Number of pages flushed as part of anticipatory batches.

• Innodb_buffer_pool_flush_background_pages

  Number of pages flushed as part of background (async) batches.

• Innodb_buffer_pool_flush_batch_scanned

  Number of pages scanned as part of a flush batch.

• Innodb_buffer_pool_flush_max_dirty_pages

  Number of pages flushed as part of max_dirty batches.

• Innodb_buffer_pool_flush_neighbor_pages

  Number of pages flushed as part of neighbor flush.

• Innodb_buffer_pool_flush_sync_page

  Number of pages flushed as part of sync batches.

• Innodb_buffer_pool_flush_async_page

  Number of pages flushed as part of async batches.

• Innodb_corrupted_page_reads

  Number of corrupted pages read.

• Innodb_corrupted_table_opens

  Number of attempts to open a table that is marked as corrupted.

• Innodb_files_open

  Number of currently open files by InnoDB.

• Innodb_files_opened

  Number of files opened by InnoDB.

• Innodb_files_closed

  Number of files closed by InnoDB.

• Innodb_files_flushed

  Number of files flushed (e.g. fsync) by InnoDB.

• Innodb_ibuf_discarded_delete_marks

  Number of discarded buffered delete mark operations.

• Innodb_ibuf_discarded_deletes

  Number of discarded buffered delete operations.

• Innodb_ibuf_discarded_inserts

  Number of discarded buffered delete operations.

• Innodb_ibuf_merged_delete_marks

  Number of delete mark operations merged.

• Innodb_ibuf_merged_deletes

  Number of delete operations merged.

• Innodb_ibuf_merged_inserts

  Number of insert operations merged.

• Innodb_ibuf_merged_pages

  Number of index pages that absorbed buffered changes.

• Innodb_ibuf_pages

  The current size (in pages) of the ibuf tree.

• Innodb_lock_deadlocks

  Number of deadlocks that have occurred within InnoDB.

• Innodb_lsn_current

  Current log sequence number.

• Innodb_lsn_flushed

  How far the log has been flushed to disk.

• Innodb_lsn_checkpoint

  Position at which InnoDB last took a checkpoint.

• Innodb_mysql_master_log_file

  The name of the master binary log file containing the event of the most recent InnoDB transaction executed by the SQL thread. If the system tablespace does not contain the replication information, the value defaults to zero.

• Innodb_mysql_master_log_pos

  The position in the master binary log file to which the SQL thread has read and executed an InnoDB transaction, marking the start of the next transaction or event to be processed. If the system tablespace does not contain the replication information, the value defaults to an empty string.

• Innodb_page_discard

  Number of page discard operations. Also represents the number of pages that have become empty and were thus discarded.

• Innodb_page_merges

  Number of page merge (attempt) operations.

• Innodb_page_merges_succeeded

  Number of successful page merge operations.

• Innodb_page_reorganizes

  Number of page reorganization operations.

• Innodb_page_splits

  Number of page split operations.

• Innodb_purge_trx_no

  The maximum transaction ID for which records have been (or are being) purged.

• Innodb_purge_undo_no

  The maximum undo log record number for which records have been (or are being) purged.

• Innodb_rows_search_btree_index

  Number of B+-tree index key searches.

• Innodb_rows_search_hash_index

  Number of adaptive hash index key searches.

• Innodb_semaphore_stalls

  Number of detected semaphore stalls (e.g. long semaphore wait).

• Innodb_tablespace_files_open

  Number of .ibd files currently open. Only relevant for multiple tablespaces.

• Innodb_tablespace_files_opened

  Number of .ibd files opened by InnoDB. Only relevant for multiple tablespaces.

• Innodb_tablespace_files_closed

  Number of .ibd files closed by InnoDB. Only relevant for multiple tablespaces.

• Innodb_trx_max_id

  The smallest number not yet assigned as a transaction ID.

• Innodb_thread_concurrency_active

  The number of active threads in InnoDB thread concurrency FIFO queue.

• Innodb_thread_concurrency_waiting

  The number of waiting threads in InnoDB thread concurrency FIFO queue.