Eu tenho um problema estranho que não consigo resolver. Sou mais programador da Web do que administrador de servidor / banco de dados, por isso espero que alguém aqui possa me ajudar.
A situação
Eu estou trabalhando em um sistema que lida com um monte de update, inserte deletepedidos. Por esse motivo, escolhi o INNODB como meu mecanismo de armazenamento por sua capacidade de bloqueio de linha. Estamos atualizando 60.000 registros a cada 10 minutos, usando o Gearman para paralelizar nosso trabalho em diferentes servidores. O código está em PHP e estamos usando o Zend Framework.
O problema
SQLSTATE[HY000]: General error: 1205 Lock wait timeout exceeded; try restarting transactionRecebemos o erro acima quase a cada 30 minutos, de um de nossos funcionários do Gearman.
o mysql_report
MySQL 5.1.63-0+squeeze1 uptime 15 9:52:12 Tue Sep 11 21:25:23 2012
__ Key _________________________________________________________________
Buffer used 55.00k of 16.00M %Used: 0.34
Current 2.92M %Usage: 18.24
Write hit 99.95%
Read hit 100.00%
__ Questions ___________________________________________________________
Total 122.05M 91.7/s
DMS 106.63M 80.1/s %Total: 87.37
Com_ 10.23M 7.7/s 8.38
COM_QUIT 4.05M 3.0/s 3.32
QC Hits 1.09M 0.8/s 0.90
+Unknown 47.77k 0.0/s 0.04
Slow 2 s 11.14M 8.4/s 9.13 %DMS: 10.45 Log: ON
DMS 106.63M 80.1/s 87.37
INSERT 69.21M 52.0/s 56.70 64.90
UPDATE 22.94M 17.2/s 18.79 21.51
DELETE 11.19M 8.4/s 9.17 10.49
SELECT 3.30M 2.5/s 2.70 3.09
REPLACE 0 0/s 0.00 0.00
Com_ 10.23M 7.7/s 8.38
set_option 4.11M 3.1/s 3.37
show_fields 3.44M 2.6/s 2.82
begin 1.33M 1.0/s 1.09
__ SELECT and Sort _____________________________________________________
Scan 4.31M 3.2/s %SELECT: 130.57
Range 52 0.0/s 0.00
Full join 24 0.0/s 0.00
Range check 0 0/s 0.00
Full rng join 1 0.0/s 0.00
Sort scan 31.98k 0.0/s
Sort range 2.05M 1.5/s
Sort mrg pass 0 0/s
__ Query Cache _________________________________________________________
Memory usage 849.84k of 16.00M %Used: 5.19
Block Fragmnt 1.57%
Hits 1.09M 0.8/s
Inserts 2.52M 1.9/s
Insrt:Prune 1.83k:1 1.9/s
Hit:Insert 0.43:1
__ Table Locks _________________________________________________________
Waited 764 0.0/s %Total: 0.00
Immediate 106.63M 80.1/s
__ Tables ______________________________________________________________
Open 128 of 128 %Cache: 100.00
Opened 4.82k 0.0/s
__ Connections _________________________________________________________
Max used 301 of 300 %Max: 100.33
Total 4.05M 3.0/s
__ Created Temp ________________________________________________________
Disk table 3.44M 2.6/s
Table 3.44M 2.6/s Size: 32.0M
File 5 0.0/s
__ Threads _____________________________________________________________
Running 20 of 89
Cached 4 of 8 %Hit: 97.29
Created 109.59k 0.1/s
Slow 0 0/s
__ Aborted _____________________________________________________________
Clients 2.95k 0.0/s
Connects 3.22k 0.0/s
__ Bytes _______________________________________________________________
Sent 13.61G 10.2k/s
Received 26.90G 20.2k/s
__ InnoDB Buffer Pool __________________________________________________
Usage 89.62M of 1.46G %Used: 5.97
Read hit 100.00%
Pages
Free 90.26k %Total: 94.03
Data 5.24k 5.46 %Drty: 2.79
Misc 498 0.52
Latched 0 0.00
Reads 728.62G 547.2k/s
From file 816 0.0/s 0.00
Ahead Rnd 3 0.0/s
Ahead Sql 27 0.0/s
Writes 715.15M 537.1/s
Flushes 11.91M 8.9/s
Wait Free 0 0/s
__ InnoDB Lock _________________________________________________________
Waits 1008791 0.8/s
Current 18
Time acquiring
Total 184022524 ms
Average 18241 ms
Max 59096 ms
__ InnoDB Data, Pages, Rows ____________________________________________
Data
Reads 919 0.0/s
Writes 14.17M 10.6/s
fsync 7.40M 5.6/s
Pending
Reads 0
Writes 0
fsync 0
Pages
Created 43.90k 0.0/s
Read 2.64k 0.0/s
Written 11.91M 8.9/s
Rows
Deleted 47.34M 35.6/s
Inserted 49.70M 37.3/s
Read 639.52G 480.3k/s
Updated 56.33M 42.3/s
O código
$this->db->beginTransaction();
try {
for($i = 0; $i < count($products); $i++)
{
$this->db->query("UPDATE userproducts SET lowest_price= :p1, last_lowest_price_update='".date("Y-m-d H:i:s", time())."' WHERE product_id = :p2", array(
'p1' => $products[$i]['price_total_end'][1],
'p2' => $products[$i]['asin']));
}
$this->db->commit();
} catch (Exception $e) {
$this->db->rollBack();
echo $e->getMessage();
}
$this->db->closeConnection();
Esse é o código para atualizar uma tabela. Temos código semelhante para atualizar outra tabela. Com o código acima, confirmamos 50 solicitações toda vez que esse método é chamado, que será a cada 30 segundos por quase 20 trabalhadores.
Ainda mais informações
mysqladmin status
Uptime: 6770 Threads: 109 Questions: 857696 Slow queries: 52469 Opens: 1382 Flush tables: 1 Open tables: 128 Queries per second avg: 126.690
mysql> SHOW STATUS LIKE 'Open%';
+--------------------------+-------+
| Variable_name | Value |
+--------------------------+-------+
| Open_files | 21 |
| Open_streams | 0 |
| Open_table_definitions | 230 |
| Open_tables | 128 |
| Opened_files | 71653 |
| Opened_table_definitions | 0 |
| Opened_tables | 0 |
+--------------------------+-------+
7 rows in set (0.00 sec)
mysql> SHOW CREATE TABLE userproducts\G
*************************** 1. row ***************************
Table: userproducts
Create Table: CREATE TABLE `userproducts` (
`id` int(20) NOT NULL AUTO_INCREMENT,
`userinfos_id` int(12) NOT NULL,
`seller_sku` varchar(35) COLLATE utf8_bin NOT NULL,
`product_id` varchar(20) COLLATE utf8_bin NOT NULL,
`price` float(8,2) NOT NULL,
`shipping` float(6,2) NOT NULL DEFAULT '0.00',
`alter_preis` float(8,2) DEFAULT NULL,
`ek_price` float(8,2) NOT NULL DEFAULT '-1.00',
`quantity` int(5) NOT NULL DEFAULT '0',
`lowest_price` float(8,2) DEFAULT NULL,
`titel` varchar(255) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL DEFAULT 'n/a',
`url` varchar(255) COLLATE utf8_bin DEFAULT NULL,
`sales_rank` int(8) DEFAULT NULL,
`kategorie` varchar(255) COLLATE utf8_bin DEFAULT NULL,
`kategorie_2` varchar(255) COLLATE utf8_bin DEFAULT NULL,
`kategorie_3` varchar(255) COLLATE utf8_bin DEFAULT NULL,
`optimierung` int(1) NOT NULL DEFAULT '0',
`indi` int(1) DEFAULT '0',
`akt_festpreis` int(1) DEFAULT '0',
`new` int(1) DEFAULT '1',
`locked` int(1) DEFAULT '0',
`determined` int(1) DEFAULT '0',
`deleted` tinyint(1) NOT NULL DEFAULT '0',
`a_m_preis` float(8,2) DEFAULT NULL,
`a_h_preis` float(8,2) DEFAULT NULL,
`m_preis` float(8,2) NOT NULL DEFAULT '0.00',
`h_preis` float(8,2) NOT NULL DEFAULT '0.00',
`preisabstand` float(6,2) DEFAULT '0.00',
`preisabstand_art` varchar(12) COLLATE utf8_bin DEFAULT 'euro',
`festpreis` float(8,2) DEFAULT '0.00',
`last_update` datetime NOT NULL,
`last_lowest_price_update` datetime DEFAULT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `seller_sku_by_seller` (`userinfos_id`,`seller_sku`),
KEY `userinfos_id` (`userinfos_id`)
) ENGINE=InnoDB AUTO_INCREMENT=32301793 DEFAULT CHARSET=utf8 COLLATE=utf8_bin
1 row in set (0.00 sec)
mysql> SHOW GLOBAL VARIABLES LIKE 'innodb%'\G
*************************** 1. row ***************************
Variable_name: innodb_adaptive_hash_index
Value: ON
*************************** 2. row ***************************
Variable_name: innodb_additional_mem_pool_size
Value: 104857600
*************************** 3. row ***************************
Variable_name: innodb_autoextend_increment
Value: 8
*************************** 4. row ***************************
Variable_name: innodb_autoinc_lock_mode
Value: 1
*************************** 5. row ***************************
Variable_name: innodb_buffer_pool_size
Value: 1572864000
*************************** 6. row ***************************
Variable_name: innodb_checksums
Value: ON
*************************** 7. row ***************************
Variable_name: innodb_commit_concurrency
Value: 0
*************************** 8. row ***************************
Variable_name: innodb_concurrency_tickets
Value: 500
*************************** 9. row ***************************
Variable_name: innodb_data_file_path
Value: ibdata1:1G;ibdata2:1G;ibdata3:1G:autoextend
*************************** 10. row ***************************
Variable_name: innodb_data_home_dir
Value: /var/lib/mysql/
*************************** 11. row ***************************
Variable_name: innodb_doublewrite
Value: ON
*************************** 12. row ***************************
Variable_name: innodb_fast_shutdown
Value: 1
*************************** 13. row ***************************
Variable_name: innodb_file_io_threads
Value: 4
*************************** 14. row ***************************
Variable_name: innodb_file_per_table
Value: ON
*************************** 15. row ***************************
Variable_name: innodb_flush_log_at_trx_commit
Value: 1
*************************** 16. row ***************************
Variable_name: innodb_flush_method
Value:
*************************** 17. row ***************************
Variable_name: innodb_force_recovery
Value: 0
*************************** 18. row ***************************
Variable_name: innodb_lock_wait_timeout
Value: 50
*************************** 19. row ***************************
Variable_name: innodb_locks_unsafe_for_binlog
Value: OFF
*************************** 20. row ***************************
Variable_name: innodb_log_buffer_size
Value: 26214400
*************************** 21. row ***************************
Variable_name: innodb_log_file_size
Value: 314572800
*************************** 22. row ***************************
Variable_name: innodb_log_files_in_group
Value: 2
*************************** 23. row ***************************
Variable_name: innodb_log_group_home_dir
Value: ./
*************************** 24. row ***************************
Variable_name: innodb_max_dirty_pages_pct
Value: 90
*************************** 25. row ***************************
Variable_name: innodb_max_purge_lag
Value: 0
*************************** 26. row ***************************
Variable_name: innodb_mirrored_log_groups
Value: 1
*************************** 27. row ***************************
Variable_name: innodb_open_files
Value: 300
*************************** 28. row ***************************
Variable_name: innodb_rollback_on_timeout
Value: OFF
*************************** 29. row ***************************
Variable_name: innodb_stats_method
Value: nulls_equal
*************************** 30. row ***************************
Variable_name: innodb_stats_on_metadata
Value: ON
*************************** 31. row ***************************
Variable_name: innodb_support_xa
Value: ON
*************************** 32. row ***************************
Variable_name: innodb_sync_spin_loops
Value: 20
*************************** 33. row ***************************
Variable_name: innodb_table_locks
Value: ON
*************************** 34. row ***************************
Variable_name: innodb_thread_concurrency
Value: 8
*************************** 35. row ***************************
Variable_name: innodb_thread_sleep_delay
Value: 10000
*************************** 36. row ***************************
Variable_name: innodb_use_legacy_cardinality_algorithm
Value: ON
36 rows in set (0.00 sec)
mysql> SHOW ENGINE INNODB STATUS\G
*************************** 1. row ***************************
Type: InnoDB
Name:
Status:
=====================================
120912 17:15:21 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 37 seconds
----------
SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 257219, signal count 242756
--Thread 47843758212864 has waited at ../../../storage/innobase/lock/lock0lock.c line 5108 for 0.00 seconds the semaphore:
Mutex at 0x2b82ed8712b8 created file ../../../storage/innobase/srv/srv0srv.c line 891, lock var 0
waiters flag 0
Mutex spin waits 0, rounds 125510621, OS waits 136209
RW-shared spins 100480, OS waits 14880; RW-excl spins 164568, OS waits 4813
------------------------
LATEST DETECTED DEADLOCK
------------------------
120912 17:14:59
*** (1) TRANSACTION:
TRANSACTION 0 20639503, ACTIVE 8 sec, process no 1655, OS thread id 47843745568512 fetching rows
mysql tables in use 1, locked 1
LOCK WAIT 700 lock struct(s), heap size 63472, 38097 row lock(s), undo log entries 2
MySQL thread id 99112, query id 2086869 s16468810.onlinehome-server.info 87.106.82.83 web0 Updating
UPDATE userproducts SET lowest_price=44.9, last_lowest_price_update='2012-09-12 17:14:53' WHERE product_id LIKE 'B007J20HN2'
*** (1) WAITING FOR THIS LOCK TO BE GRANTED:
RECORD LOCKS space id 631 page no 985 n bits 136 index `PRIMARY` of table `usr_web0_1`.`userproducts` trx id 0 20639503 lock_mode X waiting
Record lock, heap no 60 PHYSICAL RECORD: n_fields 34; compact format; info bits 0
[SOME STRANGE CHARAKTERS LIKE ABOVE]
*** (2) WAITING FOR THIS LOCK TO BE GRANTED:
RECORD LOCKS space id 631 page no 985 n bits 136 index `PRIMARY` of table `usr_web0_1`.`userproducts` trx id 0 20639496 lock_mode X locks rec but not gap waiting
Record lock, heap no 59 PHYSICAL RECORD: n_fields 34; compact format; info bits 0
0: len 4; hex 815d9f43; asc ] C;; 1: len 6; hex 0000013ae793; asc : ;; 2: len 7; hex 000000002d01e9; asc - ;; 3: len 4; hex 80006f9a; asc o ;; 4: len 12; hex 30302d3956335a2d47555a34; asc 00-9V3Z-GUZ4;; 5: len 10; hex 42303032414c38463732; asc B002AL8F72;; 6: len 4; hex cdccdb42; asc B;; 7: len 4; hex 00000000; asc ;; 8: len 4; hex cdccdb42; asc B;; 9: len 4; hex 000080bf; asc ;; 10: len 4; hex 800003e7; asc ;; 11: len 4; hex cdccdb42; asc B;; 12: len 30; hex 537572706c75732056696e74616765204a61636b65204d36352052656769; asc Surplus Vintage Jacke M65 Regi;...(truncated); 13: len 30; hex 687474703a2f2f6563782e696d616765732d616d617a6f6e2e636f6d2f69; asc http://ecx.images-amazon.com/i;...(truncated); 14: len 4; hex 800034c5; asc 4 ;; 15: len 10; hex 42656b6c656964756e67; asc Bekleidung;; 16: len 3; hex 4e2f41; asc N/A;; 17: len 3; hex 4e2f41; asc N/A;; 18: len 4; hex 80000000; asc ;; 19: len 4; hex 80000000; asc ;; 20: len 4; hex 80000000; asc ;; 21: len 4; hex 80000000; asc ;; 22: len 4; hex 80000000; asc ;; 23: len 4; hex 80000000; asc ;; 24: len 1; hex 80; asc ;; 25: SQL NULL; 26: SQL NULL; 27: len 4; hex 00000000; asc ;; 28: len 4; hex 00000000; asc ;; 29: len 4; hex 00000000; asc ;; 30: len 4; hex 6575726f; asc euro;; 31: len 4; hex 00000000; asc ;; 32: len 8; hex 8000124cc3d28e8a; asc L ;; 33: len 8; hex 8000124cc3d28fc6; asc L ;;
*** WE ROLL BACK TRANSACTION (1)
------------
TRANSACTIONS
------------
Trx id counter 0 20639610
Purge done for trx's n:o < 0 20639595 undo n:o < 0 0
History list length 4
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 0 0, not started, process no 1655, OS thread id 47843726903040
MySQL thread id 99216, query id 2090678 localhost root
SHOW ENGINE INNODB STATUS
---TRANSACTION 0 20639607, not started, process no 1655, OS thread id 47843746371328
--- [ SOME MORE LIKE THESE ]
---TRANSACTION 0 20527676, not started, process no 1655, OS thread id 47843739748096
MySQL thread id 1340, query id 5247 s16468807.onlinehome-server.info 87.106.72.226 web0
---TRANSACTION 0 20639609, ACTIVE 0 sec, process no 1655, OS thread id 47843728910080 starting index read
mysql tables in use 1, locked 1
LOCK WAIT 3 lock struct(s), heap size 1216, 2 row lock(s)
MySQL thread id 99095, query id 2090662 s16468809.onlinehome-server.info 87.106.82.94 web0 Updating
UPDATE `userproducts` SET `locked` = '0' WHERE (userinfos_id = '28565')
------- TRX HAS BEEN WAITING 0 SEC FOR THIS LOCK TO BE GRANTED:
RECORD LOCKS space id 631 page no 985 n bits 136 index `PRIMARY` of table `usr_web0_1`.`userproducts` trx id 0 20639609 lock_mode X locks rec but not gap waiting
Record lock, heap no 57 PHYSICAL RECORD: n_fields 34; compact format; info bits 0
0: len 4; hex 8158219b; asc X! ;; 1: len 6; hex 0000013aeebe; asc : ;; 2: len 7; hex 000000003208b2; asc 2 ;; 3: len 4; hex 80006f95; asc o ;; 4: len 12; hex 32592d50484d342d54475458; asc 2Y-PHM4-TGTX;; 5: len 10; hex 42303031314246525832; asc B0011BFRX2;; 6: len 4; hex 00004040; asc @@;; 7: len 4; hex 00004040; asc @@;; 8: len 4; hex 00004040; asc @@;; 9: len 4; hex 000080bf; asc ;; 10: len 4; hex 80000001; asc ;; 11: len 4; hex 33330741; asc 33 A;; 12: len 21; hex 5b556e62656b616e6e7465722045696e62616e645d; asc [Unbekannter Einband];; 13: len 30; hex 687474703a2f2f6563782e696d616765732d616d617a6f6e2e636f6d2f69; asc http://ecx.images-amazon.com/i;...(truncated); 14: len 4; hex 800d67f7; asc g ;; 15: len 1; hex 42; asc B;; 16: len 3; hex 4e2f41; asc N/A;; 17: len 3; hex 4e2f41; asc N/A;; 18: len 4; hex 80000000; asc ;; 19: len 4; hex 80000000; asc ;; 20: len 4; hex 80000000; asc ;; 21: len 4; hex 80000000; asc ;; 22: len 4; hex 80000000; asc ;; 23: len 4; hex 80000000; asc ;; 24: len 1; hex 80; asc ;; 25: SQL NULL; 26: SQL NULL; 27: len 4; hex 00000000; asc ;; 28: len 4; hex 00000000; asc ;; 29: len 4; hex 00000000; asc ;; 30: len 4; hex 6575726f; asc euro;; 31: len 4; hex 00000000; asc ;; 32: len 8; hex 8000124cc3758ea7; asc L u ;; 33: len 8; hex 8000124cc3d291b5; asc L ;;
------------------
[SOME MORE OF THESE]
------------------
---TRANSACTION 0 20639544, ACTIVE 22 sec, process no 1655, OS thread id 47843758212864 fetching rows, thread declared inside InnoDB 158
mysql tables in use 1, locked 1
60 lock struct(s), heap size 6752, 5861 row lock(s), undo log entries 29
MySQL thread id 99161, query id 2090677 s16468810.onlinehome-server.info 87.106.82.83 web0 Updating
UPDATE userproducts SET shipping=0, last_lowest_price_update='2012-09-12 17:15:22' WHERE product_id LIKE 'B00851I800' AND userinfos_id=28570
---TRANSACTION 0 20639538, ACTIVE 24 sec, process no 1655, OS thread id 47843733726976 starting index read
mysql tables in use 1, locked 1
LOCK WAIT 2 lock struct(s), heap size 368, 1 row lock(s)
MySQL thread id 99159, query id 2088002 s16468808.onlinehome-server.info 87.106.82.91 web0 Updating
UPDATE userproducts SET lowest_price=10.69, last_lowest_price_update='2012-09-12 17:14:59' WHERE product_id LIKE 'B0065JFS2U'
------- TRX HAS BEEN WAITING 24 SEC FOR THIS LOCK TO BE GRANTED:
RECORD LOCKS space id 631 page no 6 n bits 120 index `PRIMARY` of table `usr_web0_1`.`userproducts` trx id 0 20639538 lock_mode X waiting
Record lock, heap no 2 PHYSICAL RECORD: n_fields 34; compact format; info bits 0
[ SAME STRANGE CHARAKTERS]
------------------
---TRANSACTION 0 20639510, ACTIVE 29 sec, process no 1655, OS thread id 47843554330368 starting index read
mysql tables in use 1, locked 1
LOCK WAIT 2 lock struct(s), heap size 368, 1 row lock(s)
MySQL thread id 99119, query id 2086898 s16468808.onlinehome-server.info 87.106.82.91 web0 Updating
UPDATE userproducts SET lowest_price=50.8, last_lowest_price_update='2012-09-12 17:14:53' WHERE product_id LIKE 'B002MPPOUC'
------- TRX HAS BEEN WAITING 29 SEC FOR THIS LOCK TO BE GRANTED:
RECORD LOCKS space id 631 page no 6 n bits 120 index `PRIMARY` of table `usr_web0_1`.`userproducts` trx id 0 20639510 lock_mode X waiting
Record lock, heap no 2 PHYSICAL RECORD: n_fields 34; compact format; info bits 0
0: len 4; hex 8000bb1d; asc ;; 1: len 6; hex 000001394831; asc 9H1;; 2: len 7; hex 000000003409ad; asc 4 ;; 3: len 4; hex 80000003; asc ;; 4: len 12; hex 30302d364f4e4a2d48305039; asc 00-6ONJ-H0P9;; 5: len 10; hex 42303037523531533241; asc B007R51S2A;; 6: len 4; hex d7e34243; asc BC;; 7: len 4; hex 00000000; asc ;; 8: len 4; hex d7e34243; asc BC;; 9: len 4; hex 000080bf; asc ;; 10: len 4; hex 80000003; asc ;; 11: len 4; hex d7e34243; asc BC;; 12: len 30; hex 54616765736465636b65206f646572204b697373656e2041746963612037; asc Tagesdecke oder Kissen Atica 7;...(truncated); 13: len 30; hex 687474703a2f2f6563782e696d616765732d616d617a6f6e2e636f6d2f69; asc http://ecx.images-amazon.com/i;...(truncated); 14: len 4; hex 800c7b52; asc {R;; 15: len 1; hex 4b; asc K;; 16: len 3; hex 4e2f41; asc N/A;; 17: len 3; hex 4e2f41; asc N/A;; 18: len 4; hex 80000001; asc ;; 19: len 4; hex 80000000; asc ;; 20: len 4; hex 80000000; asc ;; 21: len 4; hex 80000000; asc ;; 22: len 4; hex 80000000; asc ;; 23: len 4; hex 80000000; asc ;; 24: len 1; hex 80; asc ;; 25: SQL NULL; 26: SQL NULL; 27: len 4; hex 00000000; asc ;; 28: len 4; hex 00000000; asc ;; 29: len 4; hex 00000000; asc ;; 30: len 4; hex 6575726f; asc euro;; 31: len 4; hex 00000000; asc ;; 32: len 8; hex 8000124cc3b3ba08; asc L ;; 33: len 8; hex 8000124cc3d1d42c; asc L ,;;
------------------
---TRANSACTION 0 20639508, ACTIVE 30 sec, process no 1655, OS thread id 47843558143744 fetching rows
mysql tables in use 1, locked 1
LOCK WAIT 700 lock struct(s), heap size 63472, 38096 row lock(s)
MySQL thread id 99117, query id 2086890 s16468810.onlinehome-server.info 87.106.82.83 web0 Updating
UPDATE userproducts SET lowest_price=109.9, last_lowest_price_update='2012-09-12 17:14:53' WHERE product_id LIKE 'B002AL8F72'
------- TRX HAS BEEN WAITING 1 SEC FOR THIS LOCK TO BE GRANTED:
RECORD LOCKS space id 631 page no 985 n bits 136 index `PRIMARY` of table `usr_web0_1`.`userproducts` trx id 0 20639508 lock_mode X waiting
Record lock, heap no 59 PHYSICAL RECORD: n_fields 34; compact format; info bits 0
0: len 4; hex 815d9f43; asc ] C;; 1: len 6; hex 0000013aef08; asc : ;; 2: len 7; hex 00000000391358; asc 9 X;; 3: len 4; hex 80006f9a; asc o ;; 4: len 12; hex 30302d3956335a2d47555a34; asc 00-9V3Z-GUZ4;; 5: len 10; hex 42303032414c38463732; asc B002AL8F72;; 6: len 4; hex cdccdb42; asc B;; 7: len 4; hex 00000000; asc ;; 8: len 4; hex cdccdb42; asc B;; 9: len 4; hex 000080bf; asc ;; 10: len 4; hex 800003e7; asc ;; 11: len 4; hex cdccdb42; asc B;; 12: len 30; hex 537572706c75732056696e74616765204a61636b65204d36352052656769; asc Surplus Vintage Jacke M65 Regi;...(truncated); 13: len 30; hex 687474703a2f2f6563782e696d616765732d616d617a6f6e2e636f6d2f69; asc http://ecx.images-amazon.com/i;...(truncated); 14: len 4; hex 800034c5; asc 4 ;; 15: len 10; hex 42656b6c656964756e67; asc Bekleidung;; 16: len 3; hex 4e2f41; asc N/A;; 17: len 3; hex 4e2f41; asc N/A;; 18: len 4; hex 80000000; asc ;; 19: len 4; hex 80000000; asc ;; 20: len 4; hex 80000000; asc ;; 21: len 4; hex 80000000; asc ;; 22: len 4; hex 80000000; asc ;; 23: len 4; hex 80000000; asc ;; 24: len 1; hex 80; asc ;; 25: SQL NULL; 26: SQL NULL; 27: len 4; hex 00000000; asc ;; 28: len 4; hex 00000000; asc ;; 29: len 4; hex 00000000; asc ;; 30: len 4; hex 6575726f; asc euro;; 31: len 4; hex 00000000; asc ;; 32: len 8; hex 8000124cc3d291ec; asc L ;; 33: len 8; hex 8000124cc3d28fc6; asc L ;;
------------------
--------
FILE I/O
--------
I/O thread 0 state: waiting for i/o request (insert buffer thread)
I/O thread 1 state: waiting for i/o request (log thread)
I/O thread 2 state: waiting for i/o request (read thread)
I/O thread 3 state: waiting for i/o request (write thread)
Pending normal aio reads: 0, aio writes: 0,
ibuf aio reads: 0, log i/o's: 0, sync i/o's: 0
Pending flushes (fsync) log: 0; buffer pool: 0
2714 OS file reads, 202235 OS file writes, 95816 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 8.70 writes/s, 4.68 fsyncs/s
-------------------------------------
INSERT BUFFER AND ADAPTIVE HASH INDEX
-------------------------------------
Ibuf: size 1, free list len 0, seg size 2,
0 inserts, 0 merged recs, 0 merges
Hash table size 3112859, node heap has 344 buffer(s)
7394.83 hash searches/s, 930.22 non-hash searches/s
---
LOG
---
Log sequence number 14 2880311684
Log flushed up to 14 2880309944
Last checkpoint at 14 2880298289
0 pending log writes, 0 pending chkp writes
83150 log i/o's done, 3.89 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total memory allocated 1884360120; in additional pool allocated 21052672
Dictionary memory allocated 1087464
Buffer pool size 96000
Free buffers 90835
Database pages 4818
Modified db pages 26
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages read 4102, created 716, written 187723
0.00 reads/s, 0.00 creates/s, 8.05 writes/s
Buffer pool hit rate 1000 / 1000
--------------
ROW OPERATIONS
--------------
1 queries inside InnoDB, 0 queries in queue
1 read views open inside InnoDB
Main thread process no. 1655, id 47843546388224, state: sleeping
Number of rows inserted 844694, updated 784400, deleted 836993, read 11188899916
15.40 inserts/s, 87.40 updates/s, 12.51 deletes/s, 253212.99 reads/s
----------------------------
END OF INNODB MONITOR OUTPUT
============================
1 row in set (0.01 sec)
As questões
O que neste relatório parece estranho? Para mim, não parece que estamos ficando sem memória.
O que eu não entendo são os dados do InnoDB Pages, Rows > Rows > Read,. Por que existem 480.000 leituras por segundo? O que isso significa? E parece-me que existem apenas 42 atualizações por segundo, o que não é realmente tão rápido.
E as tabelas ou arquivos abertos. Esse é um valor usual? Eu não tive experiências nesse tópico.
Algo não está funcionando como o esperado, e espero que alguém aqui possa me ajudar a encontrá-lo.
Não. Nada visto.
—
M. Hirn
1) Poste a saída de
—
RolandoMySQLDBA 12/12/12
SHOW CREATE TABLE userproducts\G, 2) Poste a saída de SHOW GLOBAL VARIABLES LIKE 'innodb%'\G, 3) Pergunta: Você instalou o plugin innodb ?, 4) Poste a saída deSHOW ENGINE INNODB STATUS\G
Eu adicionei as seguintes informações à pergunta. Mas não pude
—
M. Hirn
SHOW ENGINE INNODB STATUS\Gpostar toda a saída, porque só posso alocar um texto com 30k letras. Então eu tive que pular alguma coisa. Pergunta 3) O que você quer dizer com isso? Eu não instalei nada, apenas configurei o mecanismo de tabela para innodb.
SHOW ENGINE INNODB STATUS;saída?