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Storage engines
InnoDB
Supports transactions, row-level locking, foreign keys and encryption for tables
[ متغيرات | Buffer Pool | وضع InnoDB ]
===================================== 2026-11-03 23:56:55 0x47a0 INNODB MONITOR OUTPUT ===================================== Per second averages calculated from the last 37 seconds ----------------- BACKGROUND THREAD ----------------- srv_master_thread loops: 2557 srv_active, 0 srv_shutdown, 120570 srv_idle srv_master_thread log flush and writes: 123127 ---------- SEMAPHORES ---------- OS WAIT ARRAY INFO: reservation count 8832 OS WAIT ARRAY INFO: signal count 6715 RW-shared spins 5010, rounds 142259, OS waits 4702 RW-excl spins 1716, rounds 4712, OS waits 23 RW-sx spins 154, rounds 1236, OS waits 15 Spin rounds per wait: 28.40 RW-shared, 2.75 RW-excl, 8.03 RW-sx ------------ TRANSACTIONS ------------ Trx id counter 30472 Purge done for trx's n:o < 30472 undo n:o < 0 state: running History list length 2 LIST OF TRANSACTIONS FOR EACH SESSION: ---TRANSACTION 283270779551960, not started 0 lock struct(s), heap size 1128, 0 row lock(s) ---TRANSACTION 283270779547792, not started 0 lock struct(s), heap size 1128, 0 row lock(s) -------- FILE I/O -------- I/O thread 0 state: native aio handle (insert buffer thread) I/O thread 1 state: native aio handle (log thread) I/O thread 2 state: native aio handle (read thread) I/O thread 3 state: native aio handle (read thread) I/O thread 4 state: native aio handle (read thread) I/O thread 5 state: native aio handle (read thread) I/O thread 6 state: native aio handle (write thread) I/O thread 7 state: native aio handle (write thread) I/O thread 8 state: native aio handle (write thread) I/O thread 9 state: native aio handle (write thread) Pending normal aio reads: [0, 0, 0, 0] , aio writes: [0, 0, 0, 0] , ibuf aio reads:, log i/o's:, sync i/o's: Pending flushes (fsync) log: 0; buffer pool: 0 8326 OS file reads, 35886 OS file writes, 22870 OS fsyncs 0.49 reads/s, 16384 avg bytes/read, 4.32 writes/s, 2.97 fsyncs/s ------------------------------------- INSERT BUFFER AND ADAPTIVE HASH INDEX ------------------------------------- Ibuf: size 1, free list len 0, seg size 2, 0 merges merged operations: insert 0, delete mark 0, delete 0 discarded operations: insert 0, delete mark 0, delete 0 Hash table size 4441, node heap has 1 buffer(s) Hash table size 4441, node heap has 1 buffer(s) Hash table size 4441, node heap has 1 buffer(s) Hash table size 4441, node heap has 0 buffer(s) Hash table size 4441, node heap has 0 buffer(s) Hash table size 4441, node heap has 0 buffer(s) Hash table size 4441, node heap has 1 buffer(s) Hash table size 4441, node heap has 1 buffer(s) 1.92 hash searches/s, 5.89 non-hash searches/s --- LOG --- Log sequence number 18381242 Log flushed up to 18381242 Pages flushed up to 18381242 Last checkpoint at 18381199 0 pending log flushes, 0 pending chkp writes 13951 log i/o's done, 1.73 log i/o's/second ---------------------- BUFFER POOL AND MEMORY ---------------------- Total large memory allocated 33554432 Dictionary memory allocated 230368 Buffer pool size 1003 Free buffers 742 Database pages 256 Old database pages 0 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 8234, created 612, written 18989 0.49 reads/s, 0.00 creates/s, 2.16 writes/s Buffer pool hit rate 979 / 1000, young-making rate 0 / 1000 not 0 / 1000 Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s LRU len: 256, unzip_LRU len: 0 I/O sum[111]:cur[0], unzip sum[0]:cur[0] -------------- ROW OPERATIONS -------------- 0 queries inside InnoDB, 0 queries in queue 0 read views open inside InnoDB Process ID=468, Main thread ID=18512, state: sleeping Number of rows inserted 143, updated 2111, deleted 8, read 28968 0.00 inserts/s, 0.38 updates/s, 0.00 deletes/s, 3.27 reads/s Number of system rows inserted 0, updated 0, deleted 0, read 3137 0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s ---------------------------- END OF INNODB MONITOR OUTPUT ============================