《MysqL教程Slave memory leak and trigger oom-killer》要点：
本文介绍了MysqL教程Slave memory leak and trigger oom-killer，希望对您有用。如果有疑问，可以联系我们。
MysqL学习Bug Description
MysqL学习We have this problem:
MysqL学习we have set innodb_buffer_pool =80GB on both master and slave,master offer usually workload,but slave with nothing workload except these slave threads,But with the memory consumption is increasing,after a few days,it uses about 120GB of memory(RES) and sometime the machine starts swapping out. and in the /var/log/message
(loged :
Out of memory: Kill process 43817 (MysqLd) score 847 or sacrifice child
Killed process 43817,UID 500,(MysqLd) total-vm:126723628kB,anon-RSS:125497616kB,file-RSS:3388kB)
MysqL学习We have the exact version of PerconaServer on the master (with production workload) and it doesn't have this problem
MysqL学习This problem is the same for a few recent versions of Percona server,not just the last one.
MysqL学习we do not user MyISAM tables and just use Innodb Tables;
TokuDB is not installed.
MysqL学习this one just OOM last night T-T:
MysqL学习xiean@(none) 11:02> \s
--------------
MysqL Ver 14.14 distrib 5.6.23-72.1,for Linux (x86_64) using EditLine wrapper
MysqL学习Connection id: 252482
Current database:
Current user: xiean@localhost
SSL: Not in use
Current pager: stdout
Using outfile: ''
Using delimiter: ;
Server version: 5.6.23-72.1-log Source distribution
Protocol version: 10
Connection: Localhost via UNIX socket
Server characterset: utf8
Db characterset: utf8
Client characterset: utf8
Conn. characterset: utf8
UNIX socket: /data/MysqL/3307/var/run/MysqL.sock
Uptime: 10 hours 32 min 9 sec
MysqL学习Threads: 6 Questions: 5888709 Slow queries: 312 Opens: 200 Flush tables: 1 Open tables: 193 Queries per second avg: 155.256
--------------
MysqL学习CentOS release 6.5 (Final)
Linux xxxxxxx 2.6.32-431.el6.x86_64 #1 SMP Fri Nov 22 03:15:09 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
MysqL学习my.cnf
-----------------------------------------------------
[MysqLd]
MysqL学习skip-external-locking
skip-name-resolve
default-storage-engine = InnoDB
character-set-client-handshake = FALSE
character-set-server = utf8
collation-server = utf8_unicode_ci
init_connect='set names utf8'
connect_timeout = 20
back_log = 600
log_bin_trust_function_creators = 1
MysqL学习binlog_format = row
max_binlog_size = 512M
binlog_cache_size = 2M
expire-logs-days = 7
MysqL学习slave-net-timeout = 20
log_slave_updates = 1
relay_log_recovery = 1
sync_master_info = 1
sync_relay_log_info = 1
master_info_repository = TABLE
relay_log_info_repository = TABLE
MysqL学习slow_query_log = 1
long_query_time = 1
MysqL学习max_connections = 2000
max_user_connections = 1000
max_connect_errors = 100000
key_buffer_size = 64M
max_allowed_packet = 512M
table_open_cache = 6144
table_deFinition_cache = 4096
sort_buffer_size = 512K
read_buffer_size = 512K
read_rnd_buffer_size = 512k
join_buffer_size = 512K
tmp_table_size = 64M
max_heap_table_size = 128M
query_cache_type = 0
query_cache_size = 0
bulk_insert_buffer_size = 32M
thread_cache_size = 64
thread_stack = 256K
MysqL学习innodb_data_file_path = ibdata1:1024M:autoextend
innodb_buffer_pool_size = 80G
innodb_buffer_pool_instances = 8
innodb_additional_mem_pool_size = 16M
innodb_use_sys_malloc = 0
innodb_log_file_size = 8196M
innodb_log_buffer_size = 64M
innodb_log_files_in_group = 3
innodb_lock_wait_timeout = 30
innodb_spin_wait_delay = 96
innodb_thread_concurrency = 0
innodb_max_dirty_pages_pct = 75
innodb_support_xa = 0
innodb_flush_log_at_trx_commit = 2
innodb_flush_method = O_DIRECT
innodb_read_io_threads = 16
innodb_write_io_threads = 16
innodb_io_capacity = 2000
innodb_flush_neighbors = 0
innodb_page_size = 4K
innodb_log_block_size = 4096
innodb_file_per_table = 1
innodb_file_format = Barracuda
innodb_file_format_max = Barracuda
innodb_strict_mode = 1
innodb_purge_threads = 2
innodb_purge_batch_size = 32
innodb_old_blocks_pct = 37
innodb_old_blocks_time = 1000
innodb_change_buffering = all
innodb_stats_on_Metadata = off
MysqL学习innodb_buffer_pool_dump_at_shutdown = 1
innodb_buffer_pool_load_at_startup = 1
MysqL学习show engine innodb status\G
MysqL学习=====================================
2016-03-22 11:08:07 7f8496af9700 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 3 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 35735 srv_active,0 srv_shutdown,2389 srv_idle
srv_master_thread log flush and writes: 38124
----------
SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 27319
OS WAIT ARRAY INFO: signal count 694283
Mutex spin waits 13779381,rounds 15836207,OS waits 12843
RW-shared spins 3653866,rounds 16984184,OS waits 11004
RW-excl spins 562597,rounds 1648229,OS waits 2980
Spin rounds per wait: 1.15 mutex,4.65 RW-shared,2.93 RW-excl
MysqL学习....................................................
MysqL学习----------------------
BUFFER POOL AND MEMORY
----------------------
Total memory allocated 107356939316; in additional pool allocated 8441088
Total memory allocated by read views 496
Internal hash tables (constant factor + variable factor)
Adaptive hash index 2118609544 (1359985288 + 758624256)
Page hash 42500456 (buffer pool 0 only)
Dictionary cache 340576340 (339997712 + 578628)
File system 867904 (812272 + 55632)
Lock system 849995224 (849992296 + 2928)
Recovery system 0 (0 + 0)
Dictionary memory allocated 578628
Buffer pool size 20971512
Buffer pool size,bytes 85899313152
Free buffers 793287
Database pages 19993014
Old database pages 7380256
Modified db pages 857786
Pending reads 0
Pending writes: LRU 0,flush list 0,single page 0
Pages made young 1500483,not young 791938
3.00 youngs/s,3.67 non-youngs/s
Pages read 19777369,created 365977,written 1705540
6.33 reads/s,9.00 creates/s,255.25 writes/s
Buffer pool hit rate 1000 / 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: 19993014,unzip_LRU len: 0
I/O sum[36104]:cur[1320],unzip sum[0]:cur[0]
----------------------
INDIVIDUAL BUFFER POOL INFO
----------------------
---BUFFER POOL 0
Buffer pool size 2621439
Buffer pool size,bytes 10737414144
Free buffers 1024
Database pages 2597173
Old database pages 958702
Modified db pages 110539
Pending reads 0
Pending writes: LRU 0,single page 0
Pages made young 497074,not young 305154
0.67 youngs/s,3.67 non-youngs/s
Pages read 2603703,created 46719,written 271137
1.00 reads/s,0.33 creates/s,17.33 writes/s
Buffer pool hit rate 1000 / 1000,Random read ahead 0.00/s
LRU len: 2597173,unzip_LRU len: 0
I/O sum[4513]:cur[165],unzip sum[0]:cur[0]
---BUFFER POOL 1
Buffer pool size 2621439
Buffer pool size,bytes 10737414144
Free buffers 1024
Database pages 2597316
Old database pages 958754
Modified db pages 115355
Pending reads 0
Pending writes: LRU 0,single page 0
Pages made young 496041,not young 238137
1.00 youngs/s,0.00 non-youngs/s
Pages read 2593888,created 50425,written 264354
0.33 reads/s,3.00 creates/s,29.66 writes/s
Buffer pool hit rate 1000 / 1000,Random read ahead 0.00/s
LRU len: 2597316,unzip sum[0]:cur[0]
---BUFFER POOL 2
Buffer pool size 2621439
Buffer pool size,bytes 10737414144
Free buffers 1024
Database pages 2597259
Old database pages 958733
Modified db pages 115748
Pending reads 0
Pending writes: LRU 0,single page 0
Pages made young 496770,not young 248647
1.00 youngs/s,0.00 non-youngs/s
Pages read 2595651,created 51694,written 240683
1.00 reads/s,0.00 creates/s,35.99 writes/s
Buffer pool hit rate 1000 / 1000,Random read ahead 0.00/s
LRU len: 2597259,unzip sum[0]:cur[0]
---BUFFER POOL 3
Buffer pool size 2621439
Buffer pool size,bytes 10737414144
Free buffers 117082
Database pages 2481220
Old database pages 915938
Modified db pages 112864
Pending reads 0
Pending writes: LRU 0,single page 0
Pages made young 2305,not young 0
0.00 youngs/s,0.00 non-youngs/s
Pages read 2429753,created 51467,written 248967
0.00 reads/s,40.99 writes/s
Buffer pool hit rate 1000 / 1000,Random read ahead 0.00/s
LRU len: 2481220,unzip sum[0]:cur[0]
---BUFFER POOL 4
Buffer pool size 2621439
Buffer pool size,bytes 10737414144
Free buffers 207591
Database pages 2390638
Old database pages 882501
Modified db pages 103991
Pending reads 0
Pending writes: LRU 0,single page 0
Pages made young 2163,not young 0
0.33 youngs/s,0.00 non-youngs/s
Pages read 2345049,created 45589,written 214434
1.00 reads/s,1.00 creates/s,32.99 writes/s
Buffer pool hit rate 1000 / 1000,Random read ahead 0.00/s
LRU len: 2390638,unzip sum[0]:cur[0]
---BUFFER POOL 5
Buffer pool size 2621439
Buffer pool size,bytes 10737414144
Free buffers 202652
Database pages 2395634
Old database pages 884332
Modified db pages 99353
Pending reads 0
Pending writes: LRU 0,single page 0
Pages made young 2061,0.00 non-youngs/s
Pages read 2354114,created 41520,written 147347
0.67 reads/s,3.67 creates/s,30.99 writes/s
Buffer pool hit rate 1000 / 1000,Random read ahead 0.00/s
LRU len: 2395634,unzip sum[0]:cur[0]
---BUFFER POOL 6
Buffer pool size 2621439
Buffer pool size,bytes 10737414144
Free buffers 209285
Database pages 2389036
Old database pages 881910
Modified db pages 96899
Pending reads 0
Pending writes: LRU 0,single page 0
Pages made young 1913,0.00 non-youngs/s
Pages read 2349930,created 39106,written 150174
1.33 reads/s,0.67 creates/s,38.65 writes/s
Buffer pool hit rate 1000 / 1000,Random read ahead 0.00/s
LRU len: 2389036,unzip sum[0]:cur[0]
---BUFFER POOL 7
Buffer pool size 2621439
Buffer pool size,bytes 10737414144
Free buffers 53605
Database pages 2544738
Old database pages 939386
Modified db pages 103037
Pending reads 0
Pending writes: LRU 0,single page 0
Pages made young 2156,0.00 non-youngs/s
Pages read 2505281,created 39457,written 168444
1.00 reads/s,28.66 writes/s
Buffer pool hit rate 1000 / 1000,Random read ahead 0.00/s
LRU len: 2544738,unzip sum[0]:cur[0]
--------------
ROW OPERATIONS
--------------
0 queries inside InnoDB,0 queries in queue
1 read views open inside InnoDB
0 RW transactions active inside InnoDB
0 RO transactions active inside InnoDB
0 out of 1000 descriptors used
---OLDEST VIEW---
normal read view
Read view low limit trx n:o 4402678824
Read view up limit trx id 4402678824
Read view low limit trx id 4402678824
Read view individually stored trx ids:
-----------------
Main thread process no. 70096,id 140207583508224,state: sleeping
Number of rows inserted 1347486,updated 6484099,deleted 505223,read 4665086631
106.63 inserts/s,1017.66 updates/s,0.00 deletes/s,1682192.60 reads/s
----------------------------
END OF INNODB MONITOR OUTPUT
============================
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