MariaDB [(none)]> show engine innodb status -> ; | Type | Name | Status | | InnoDB | | ===================================== 2017-01-07 15:16:41 7f1a81af4b00 INNODB MONITOR OUTPUT ===================================== Per second averages calculated from the last 23 seconds ----------------- BACKGROUND THREAD ----------------- srv_master_thread loops: 20 srv_active, 0 srv_shutdown, 9546 srv_idle srv_master_thread log flush and writes: 9566 ---------- SEMAPHORES ---------- OS WAIT ARRAY INFO: reservation count 9435635 OS WAIT ARRAY INFO: signal count 9530124 Mutex spin waits 6171343967, rounds 82407239440, OS waits 200704 RW-shared spins 21, rounds 630, OS waits 21 RW-excl spins 0, rounds 0, OS waits 0 Spin rounds per wait: 13.35 mutex, 30.00 RW-shared, 0.00 RW-excl ------------ TRANSACTIONS ------------ Trx id counter 495046 Purge done for trx's n:o < 495045 undo n:o < 0 state: running but idle History list length 983 LIST OF TRANSACTIONS FOR EACH SESSION: ---TRANSACTION 0, not started MySQL thread id 8, OS thread handle 0x7f1a81af4b00, query id 1933 localhost root init show engine innodb status ---TRANSACTION 494851, not started MySQL thread id 1, OS thread handle 0x7f1a81bd2b00, query id 0 Waiting for background binlog tasks -------- FILE I/O -------- I/O thread 0 state: waiting for completed aio requests (insert buffer thread) I/O thread 1 state: waiting for completed aio requests (log thread) I/O thread 2 state: waiting for completed aio requests (read thread) I/O thread 3 state: waiting for completed aio requests (read thread) I/O thread 4 state: waiting for completed aio requests (read thread) I/O thread 5 state: waiting for completed aio requests (read thread) I/O thread 6 state: waiting for completed aio requests (write thread) I/O thread 7 state: waiting for completed aio requests (write thread) I/O thread 8 state: waiting for completed aio requests (write thread) I/O thread 9 state: waiting for completed aio requests (write thread) Pending normal aio reads: 0 [0, 0, 0, 0] , aio writes: 0 [0, 0, 0, 0] , ibuf aio reads: 0, log i/o's: 0, sync i/o's: 0 Pending flushes (fsync) log: 0; buffer pool: 0 882 OS file reads, 217 OS file writes, 122 OS fsyncs 0.00 reads/s, 0 avg bytes/read, 0.00 writes/s, 0.00 fsyncs/s ------------------------------------- INSERT BUFFER AND ADAPTIVE HASH INDEX ------------------------------------- Ibuf: size 1, free list len 0, seg size 2, 18 merges merged operations: insert 13, delete mark 5, delete 0 discarded operations: insert 0, delete mark 0, delete 0 0.00 hash searches/s, 0.00 non-hash searches/s --- LOG --- Log sequence number 16007655 Log flushed up to 16007655 Pages flushed up to 16007655 Last checkpoint at 16007655 Max checkpoint age 80826164 Checkpoint age target 78300347 Modified age 0 Checkpoint age 0 0 pending log writes, 0 pending chkp writes 68 log i/o's done, 0.00 log i/o's/second ---------------------- BUFFER POOL AND MEMORY ---------------------- Total memory allocated 281542656; in additional pool allocated 0 Total memory allocated by read views 88 Internal hash tables (constant factor + variable factor) Adaptive hash index 4774096 (4425832 + 348264) Page hash 277432 (buffer pool 0 only) Dictionary cache 1632003 (1107952 + 524051) File system 865608 (812272 + 53336) Lock system 665656 (664936 + 720) Recovery system 0 (0 + 0) Dictionary memory allocated 524051 Buffer pool size 16383 Buffer pool size, bytes 268419072 Free buffers 15670 Database pages 692 Old database pages 275 Modified db pages 0 Percent of dirty pages(LRU & free pages): 0.000 Max dirty pages percent: 75.000 Pending reads 0 Pending writes: LRU 0, flush list 0, single page 0 Pages made young 0, not young 0 0.00 youngs/s, 0.00 non-youngs/s Pages read 692, created 0, written 134 0.00 reads/s, 0.00 creates/s, 0.00 writes/s No buffer pool page gets since the last printout Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s LRU len: 692, unzip_LRU len: 0 I/O sum[0]:cur[0], unzip sum[0]:cur[0] -------------- ROW OPERATIONS -------------- 0 queries inside InnoDB, 0 queries in queue 0 read views open inside InnoDB 0 RW transactions active inside InnoDB 0 RO transactions active inside InnoDB 0 out of 1000 descriptors used Main thread process no. 4244, id 139750920926976, state: sleeping Number of rows inserted 2, updated 16, deleted 1, read 1080053 0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s Number of system rows inserted 0, updated 0, deleted 0, read 0 0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s ---------------------------- END OF INNODB MONITOR OUTPUT ============================