MDEV-31308 InnoDB monitor trx_rseg_history_len was accidentally disabled by default

innodb_counter_info[]: Revert a change that was accidentally made in
commit 204e7225

mysql-test/suite/innodb/r/monitor.result

-set global innodb_monitor_disable = All;
 select name, if(enabled,'enabled','disabled') status
 from information_schema.innodb_metrics;
 name	status
 metadata_table_handles_opened	disabled
-lock_deadlocks	disabled
-lock_timeouts	disabled
+lock_deadlocks	enabled
+lock_timeouts	enabled
 lock_rec_lock_waits	disabled
 lock_table_lock_waits	disabled
 lock_rec_lock_requests	disabled
@@ -14,32 +13,32 @@ lock_rec_locks	disabled
 lock_table_lock_created	disabled
 lock_table_lock_removed	disabled
 lock_table_locks	disabled
-lock_row_lock_current_waits	disabled
-lock_row_lock_time	disabled
-lock_row_lock_time_max	disabled
-lock_row_lock_waits	disabled
-lock_row_lock_time_avg	disabled
-buffer_pool_size	disabled
-buffer_pool_reads	disabled
-buffer_pool_read_requests	disabled
-buffer_pool_write_requests	disabled
-buffer_pool_wait_free	disabled
-buffer_pool_read_ahead	disabled
-buffer_pool_read_ahead_evicted	disabled
-buffer_pool_pages_total	disabled
-buffer_pool_pages_misc	disabled
-buffer_pool_pages_data	disabled
-buffer_pool_bytes_data	disabled
-buffer_pool_pages_dirty	disabled
-buffer_pool_bytes_dirty	disabled
-buffer_pool_pages_free	disabled
-buffer_pages_created	disabled
-buffer_pages_written	disabled
-buffer_pages_read	disabled
-buffer_index_sec_rec_cluster_reads	disabled
-buffer_index_sec_rec_cluster_reads_avoided	disabled
-buffer_data_reads	disabled
-buffer_data_written	disabled
+lock_row_lock_current_waits	enabled
+lock_row_lock_time	enabled
+lock_row_lock_time_max	enabled
+lock_row_lock_waits	enabled
+lock_row_lock_time_avg	enabled
+buffer_pool_size	enabled
+buffer_pool_reads	enabled
+buffer_pool_read_requests	enabled
+buffer_pool_write_requests	enabled
+buffer_pool_wait_free	enabled
+buffer_pool_read_ahead	enabled
+buffer_pool_read_ahead_evicted	enabled
+buffer_pool_pages_total	enabled
+buffer_pool_pages_misc	enabled
+buffer_pool_pages_data	enabled
+buffer_pool_bytes_data	enabled
+buffer_pool_pages_dirty	enabled
+buffer_pool_bytes_dirty	enabled
+buffer_pool_pages_free	enabled
+buffer_pages_created	enabled
+buffer_pages_written	enabled
+buffer_pages_read	enabled
+buffer_index_sec_rec_cluster_reads	enabled
+buffer_index_sec_rec_cluster_reads_avoided	enabled
+buffer_data_reads	enabled
+buffer_data_written	enabled
 buffer_flush_batch_scanned	disabled
 buffer_flush_batch_num_scan	disabled
 buffer_flush_batch_scanned_per_call	disabled
@@ -72,8 +71,8 @@ buffer_flush_background_pages	disabled
 buffer_LRU_batch_scanned	disabled
 buffer_LRU_batch_num_scan	disabled
 buffer_LRU_batch_scanned_per_call	disabled
-buffer_LRU_batch_flush_total_pages	disabled
-buffer_LRU_batch_evict_total_pages	disabled
+buffer_LRU_batch_flush_total_pages	enabled
+buffer_LRU_batch_evict_total_pages	enabled
 buffer_LRU_single_flush_failure_count	disabled
 buffer_LRU_get_free_search	disabled
 buffer_LRU_search_scanned	disabled
@@ -114,24 +113,24 @@ buffer_page_written_blob	disabled
 buffer_page_written_zblob	disabled
 buffer_page_written_zblob2	disabled
 buffer_page_written_other	disabled
-os_data_reads	disabled
-os_data_writes	disabled
-os_data_fsyncs	disabled
-os_pending_reads	disabled
-os_pending_writes	disabled
-os_log_bytes_written	disabled
-os_log_fsyncs	disabled
-os_log_pending_fsyncs	disabled
-os_log_pending_writes	disabled
+os_data_reads	enabled
+os_data_writes	enabled
+os_data_fsyncs	enabled
+os_pending_reads	enabled
+os_pending_writes	enabled
+os_log_bytes_written	enabled
+os_log_fsyncs	enabled
+os_log_pending_fsyncs	enabled
+os_log_pending_writes	enabled
 trx_rw_commits	disabled
 trx_ro_commits	disabled
 trx_nl_ro_commits	disabled
 trx_commits_insert_update	disabled
 trx_rollbacks	disabled
 trx_rollbacks_savepoint	disabled
-trx_rseg_history_len	disabled
+trx_rseg_history_len	enabled
 trx_undo_slots_used	disabled
-trx_undo_slots_cached	disabled
+trx_undo_slots_cached	enabled
 trx_rseg_current_size	disabled
 purge_del_mark_records	disabled
 purge_upd_exist_or_extern_records	disabled
@@ -150,10 +149,10 @@ log_max_modified_age_async	disabled
 log_pending_log_flushes	disabled
 log_pending_checkpoint_writes	disabled
 log_num_log_io	disabled
-log_waits	disabled
-log_write_requests	disabled
-log_writes	disabled
-log_padded	disabled
+log_waits	enabled
+log_write_requests	enabled
+log_writes	enabled
+log_padded	enabled
 compress_pages_compressed	disabled
 compress_pages_decompressed	disabled
 compression_pad_increments	disabled
@@ -171,42 +170,42 @@ index_page_merge_successful	disabled
 index_page_reorg_attempts	disabled
 index_page_reorg_successful	disabled
 index_page_discards	disabled
-adaptive_hash_searches	disabled
-adaptive_hash_searches_btree	disabled
+adaptive_hash_searches	enabled
+adaptive_hash_searches_btree	enabled
 adaptive_hash_pages_added	disabled
 adaptive_hash_pages_removed	disabled
 adaptive_hash_rows_added	disabled
 adaptive_hash_rows_removed	disabled
 adaptive_hash_rows_deleted_no_hash_entry	disabled
 adaptive_hash_rows_updated	disabled
-file_num_open_files	disabled
-ibuf_merges_insert	disabled
-ibuf_merges_delete_mark	disabled
-ibuf_merges_delete	disabled
-ibuf_merges_discard_insert	disabled
-ibuf_merges_discard_delete_mark	disabled
-ibuf_merges_discard_delete	disabled
-ibuf_merges	disabled
-ibuf_size	disabled
+file_num_open_files	enabled
+ibuf_merges_insert	enabled
+ibuf_merges_delete_mark	enabled
+ibuf_merges_delete	enabled
+ibuf_merges_discard_insert	enabled
+ibuf_merges_discard_delete_mark	enabled
+ibuf_merges_discard_delete	enabled
+ibuf_merges	enabled
+ibuf_size	enabled
 innodb_master_thread_sleeps	disabled
-innodb_activity_count	disabled
+innodb_activity_count	enabled
 innodb_master_active_loops	disabled
 innodb_master_idle_loops	disabled
 innodb_log_flush_usec	disabled
 innodb_dict_lru_usec	disabled
 innodb_dict_lru_count_active	disabled
 innodb_dict_lru_count_idle	disabled
-innodb_dblwr_writes	disabled
-innodb_dblwr_pages_written	disabled
-innodb_page_size	disabled
+innodb_dblwr_writes	enabled
+innodb_dblwr_pages_written	enabled
+innodb_page_size	enabled
 dml_reads	disabled
-dml_inserts	disabled
-dml_deletes	disabled
-dml_updates	disabled
-dml_system_reads	disabled
-dml_system_inserts	disabled
-dml_system_deletes	disabled
-dml_system_updates	disabled
+dml_inserts	enabled
+dml_deletes	enabled
+dml_updates	enabled
+dml_system_reads	enabled
+dml_system_inserts	enabled
+dml_system_deletes	enabled
+dml_system_updates	enabled
 ddl_background_drop_indexes	disabled
 ddl_online_create_index	disabled
 ddl_pending_alter_table	disabled
@@ -216,6 +215,9 @@ icp_attempts	disabled
 icp_no_match	disabled
 icp_out_of_range	disabled
 icp_match	disabled
+set global innodb_monitor_disable = All;
+select name from information_schema.innodb_metrics where enabled;
+name
 set global innodb_monitor_enable = all;
 select name from information_schema.innodb_metrics where not enabled;
 name

mysql-test/suite/innodb/t/monitor.test

@@ -5,12 +5,14 @@
 # sys_vars.innodb_monitor_enable_basic
 
 --source include/have_innodb.inc
-set global innodb_monitor_disable = All;
 # Test turn on/off the monitor counter  with "all" option
 # By default, they will be off.
 select name, if(enabled,'enabled','disabled') status
 from information_schema.innodb_metrics;
 
+set global innodb_monitor_disable = All;
+select name from information_schema.innodb_metrics where enabled;
+
 # Turn on all monitor counters
 set global innodb_monitor_enable = all;
 

storage/innobase/srv/srv0mon.cc

@@ -704,7 +704,7 @@ static monitor_info_t	innodb_counter_info[] =
 	{"trx_rseg_history_len", "transaction",
 	 "Length of the TRX_RSEG_HISTORY list",
 	 static_cast<monitor_type_t>(
-	 MONITOR_EXISTING | MONITOR_DISPLAY_CURRENT),
+	 MONITOR_EXISTING | MONITOR_DISPLAY_CURRENT | MONITOR_DEFAULT_ON),
 	 MONITOR_DEFAULT_START, MONITOR_RSEG_HISTORY_LEN},
 
 	{"trx_undo_slots_used", "transaction", "Number of undo slots used",