MySql version 5.7.12 stürzt ab

Question

Wir haben von SqlServer 2008 zu MySql Version 5.7.12 auf AWS EC2 Instanz von Ubuntu 14.04 LTS Version migriert. Der Server wird wiederholt abgestürzt. Die Protokolle sind wie folgt:

2016-05-25T06:17:40.045804Z 2946 [Note] Aborted connection 2946 to db: 'dbowithrw' user: 'cwuser' host: '172.16.4.138' (Got an error reading communication packets) 
2016-05-25T06:17:40.046804Z 2938 [Note] Aborted connection 2938 to db: 'dbowithrw' user: 'cwuser' host: '172.16.4.138' (Got an error reading communication packets) 
2016-05-25T06:17:40.046817Z 2945 [Note] Aborted connection 2945 to db: 'dbowithrw' user: 'cwuser' host: '172.16.4.138' (Got an error reading communication packets) 
2016-05-25T06:22:41.447479Z 2985 [Note] Aborted connection 2985 to db: 'dbowithrw' user: 'cwuser' host: '172.16.1.48' (Got an error reading communication packets) 
2016-05-25T06:22:41.447483Z 2964 [Note] Aborted connection 2964 to db: 'dbowithrw' user: 'cwuser' host: '172.16.1.48' (Got an error reading communication packets) 
2016-05-25T06:24:11.317802Z 2931 [Note] Aborted connection 2931 to db: 'dbowithrw' user: 'cwuser' host: '172.16.2.172' (Got an error reading communication packets) 
2016-05-25T06:34:51.345602Z 3008 [Note] Aborted connection 3008 to db: 'dbowithrw' user: 'cwuser' host: '172.16.1.48' (Got an error reading communication packets) 
06:35:45 UTC - mysqld got signal 11 ; 
This could be because you hit a bug. It is also possible that this binary 
or one of the libraries it was linked against is corrupt, improperly built, 
or misconfigured. This error can also be caused by malfunctioning hardware. 
Attempting to collect some information that could help diagnose the problem. 
As this is a crash and something is definitely wrong, the information 
collection process might fail. 

key_buffer_size=52428800 
read_buffer_size=20971520 
max_used_connections=284 
max_threads=214 
thread_count=283 
connection_count=283 
It is possible that mysqld could use up to 
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 8843311 K bytes of memory 
Hope that's ok; if not, decrease some variables in the equation. 

Thread pointer: 0x7fe34c6be4d0 
Attempting backtrace. You can use the following information to find out 
where mysqld died. If you see no messages after this, something went 
terribly wrong... 
stack_bottom = 7fe40a536e40 thread_stack 0x40000 
/usr/sbin/mysqld(my_print_stacktrace+0x2c)[0xebef8c] 
/usr/sbin/mysqld(handle_fatal_signal+0x451)[0x7acb61] 
/lib/x86_64-linux-gnu/libpthread.so.0(+0x10340)[0x7fe6f98f4340] 
/usr/sbin/mysqld(_ZN14Item_func_case7cleanupEv+0x21)[0x8236b1] 
/usr/sbin/mysqld(_Z13cleanup_itemsP4Item+0x21)[0xc94431] 
/usr/sbin/mysqld(_ZN5TABLE16cleanup_gc_itemsEv+0x34)[0xd37234] 
/usr/sbin/mysqld(_Z19close_thread_tablesP3THD+0x5f)[0xc404ff] 
/usr/sbin/mysqld(_Z21mysql_execute_commandP3THDb+0x4b7)[0xc970c7] 
/usr/sbin/mysqld(_ZN13sp_instr_stmt9exec_coreEP3THDPj+0x50)[0xc20d00] 
/usr/sbin/mysqld(_ZN12sp_lex_instr23reset_lex_and_exec_coreEP3THDPjb+0x384)[0xc228e4] 
/usr/sbin/mysqld(_ZN12sp_lex_instr29validate_lex_and_execute_coreEP3THDPjb+0xab)[0xc2327b] 
/usr/sbin/mysqld(_ZN13sp_instr_stmt7executeEP3THDPj+0x120)[0xc24410] 
/usr/sbin/mysqld(_ZN7sp_head7executeEP3THDb+0x4f4)[0xc1c624] 
/usr/sbin/mysqld(_ZN7sp_head15execute_triggerEP3THDRK25st_mysql_const_lex_stringS4_P10GRANT_INFO+0x1fc)[0xc1cedc] 
/usr/sbin/mysqld(_ZN7Trigger7executeEP3THD+0x10d)[0xd403ed] 
/usr/sbin/mysqld(_ZN13Trigger_chain16execute_triggersEP3THD+0x18)[0xd434a8] 
/usr/sbin/mysqld(_ZN24Table_trigger_dispatcher16process_triggersEP3THD23enum_trigger_event_type29enum_trigger_action_time_typeb+0x52)[0xd3cee2] 
/usr/sbin/mysqld(_Z12mysql_updateP3THDR4ListI4ItemES4_y15enum_duplicatesPyS6_+0x134d)[0xd1cead] 
/usr/sbin/mysqld(_ZN14Sql_cmd_update23try_single_table_updateEP3THDPb+0x1b6)[0xd1f346] 
/usr/sbin/mysqld(_ZN14Sql_cmd_update7executeEP3THD+0x27)[0xd1f667] 
/usr/sbin/mysqld(_Z21mysql_execute_commandP3THDb+0x5d0)[0xc971e0] 
/usr/sbin/mysqld(_ZN13sp_instr_stmt9exec_coreEP3THDPj+0x50)[0xc20d00] 
/usr/sbin/mysqld(_ZN12sp_lex_instr23reset_lex_and_exec_coreEP3THDPjb+0x384)[0xc228e4] 
/usr/sbin/mysqld(_ZN12sp_lex_instr29validate_lex_and_execute_coreEP3THDPjb+0xab)[0xc2327b] 
/usr/sbin/mysqld(_ZN13sp_instr_stmt7executeEP3THDPj+0x120)[0xc24410] 
/usr/sbin/mysqld(_ZN7sp_head7executeEP3THDb+0x4f4)[0xc1c624] 
/usr/sbin/mysqld(_ZN7sp_head15execute_triggerEP3THDRK25st_mysql_const_lex_stringS4_P10GRANT_INFO+0x1fc)[0xc1cedc] 
/usr/sbin/mysqld(_ZN7Trigger7executeEP3THD+0x10d)[0xd403ed] 
/usr/sbin/mysqld(_ZN13Trigger_chain16execute_triggersEP3THD+0x18)[0xd434a8] 
/usr/sbin/mysqld(_ZN24Table_trigger_dispatcher16process_triggersEP3THD23enum_trigger_event_type29enum_trigger_action_time_typeb+0x52)[0xd3cee2] 
/usr/sbin/mysqld(_Z12mysql_updateP3THDR4ListI4ItemES4_y15enum_duplicatesPyS6_+0x134d)[0xd1cead] 
/usr/sbin/mysqld(_ZN14Sql_cmd_update23try_single_table_updateEP3THDPb+0x1b6)[0xd1f346] 
/usr/sbin/mysqld(_ZN14Sql_cmd_update7executeEP3THD+0x27)[0xd1f667] 
/usr/sbin/mysqld(_Z21mysql_execute_commandP3THDb+0x5d0)[0xc971e0] 
/usr/sbin/mysqld(_ZN13sp_instr_stmt9exec_coreEP3THDPj+0x50)[0xc20d00] 
/usr/sbin/mysqld(_ZN12sp_lex_instr23reset_lex_and_exec_coreEP3THDPjb+0x384)[0xc228e4] 
/usr/sbin/mysqld(_ZN12sp_lex_instr29validate_lex_and_execute_coreEP3THDPjb+0xab)[0xc2327b] 
/usr/sbin/mysqld(_ZN13sp_instr_stmt7executeEP3THDPj+0x120)[0xc24410] 
/usr/sbin/mysqld(_ZN7sp_head7executeEP3THDb+0x4f4)[0xc1c624] 
/usr/sbin/mysqld(_ZN7sp_head17execute_procedureEP3THDP4ListI4ItemE+0x757)[0xc200b7] 
/usr/sbin/mysqld(_Z21mysql_execute_commandP3THDb+0x1c25)[0xc98835] 
/usr/sbin/mysqld(_Z11mysql_parseP3THDP12Parser_state+0x385)[0xc9d3e5] 
/usr/sbin/mysqld(_Z16dispatch_commandP3THDPK8COM_DATA19enum_server_command+0x8d7)[0xc9dd27] 
/usr/sbin/mysqld(_Z10do_commandP3THD+0x177)[0xc9f667] 
/usr/sbin/mysqld(handle_connection+0x278)[0xd5a138] 
/usr/sbin/mysqld(pfs_spawn_thread+0x1b4)[0xee4224] 
/lib/x86_64-linux-gnu/libpthread.so.0(+0x8182)[0x7fe6f98ec182] 
/lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7fe6f8df947d] 

Trying to get some variables. 
Some pointers may be invalid and cause the dump to abort. 
Query (7fe34dd976e0): is an invalid pointer 
Connection ID (thread ID): 3055 
Status: NOT_KILLED 

The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains 
information that should help you find out what is causing the crash. 
2016-05-25T06:35:45.130129Z mysqld_safe Number of processes running now: 0 
2016-05-25T06:35:45.131247Z mysqld_safe mysqld restarted 
2016-05-25T06:35:45.136417Z 0 [Warning] Could not increase number of max_open_files to more than 1024 (request: 30000) 
2016-05-25T06:35:45.136469Z 0 [Warning] Changed limits: max_connections: 214 (requested 700) 
2016-05-25T06:35:45.136472Z 0 [Warning] Changed limits: table_open_cache: 400 (requested 4000) 
2016-05-25T06:35:45.285890Z 0 [Note] /usr/sbin/mysqld (mysqld 5.7.12) starting as process 5208 ... 
2016-05-25T06:35:45.291032Z 0 [Note] InnoDB: PUNCH HOLE support available 
2016-05-25T06:35:45.291101Z 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins 
2016-05-25T06:35:45.291118Z 0 [Note] InnoDB: Uses event mutexes 
2016-05-25T06:35:45.291129Z 0 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier 
2016-05-25T06:35:45.291140Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.8 
2016-05-25T06:35:45.291152Z 0 [Note] InnoDB: Using Linux native AIO 
2016-05-25T06:35:45.291417Z 0 [Note] InnoDB: Number of pools: 1 
2016-05-25T06:35:45.291538Z 0 [Note] InnoDB: Using CPU crc32 instructions 
2016-05-25T06:35:45.298282Z 0 [Note] InnoDB: Initializing buffer pool, total size = 10G, instances = 8, chunk size = 128M 
2016-05-25T06:35:45.777778Z 0 [Note] InnoDB: Completed initialization of buffer pool 
2016-05-25T06:35:45.835555Z 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority(). 
2016-05-25T06:35:45.853945Z 0 [Note] InnoDB: Highest supported file format is Barracuda. 
2016-05-25T06:35:45.893013Z 0 [Note] InnoDB: Log scan progressed past the checkpoint lsn 688601815952 
2016-05-25T06:35:46.011211Z 0 [Note] InnoDB: Doing recovery: scanned up to log sequence number 688607058432 
2016-05-25T06:35:46.130727Z 0 [Note] InnoDB: Doing recovery: scanned up to log sequence number 688612301312 
2016-05-25T06:35:46.250410Z 0 [Note] InnoDB: Doing recovery: scanned up to log sequence number 688617544192 
2016-05-25T06:35:46.369991Z 0 [Note] InnoDB: Doing recovery: scanned up to log sequence number 688622787072 
2016-05-25T06:35:46.439395Z 0 [Note] InnoDB: Ignoring data file './dbowithrw/sureshprasad.ibd' with space ID 8686, since the redo log references ./dbowithrw/sureshprasad.ibd with space ID 8685. 
2016-05-25T06:35:46.621020Z 0 [Note] InnoDB: Doing recovery: scanned up to log sequence number 688628029952 
2016-05-25T06:35:46.926647Z 0 [Note] InnoDB: Doing recovery: scanned up to log sequence number 688633272832 
2016-05-25T06:35:47.220662Z 0 [Note] InnoDB: Doing recovery: scanned up to log sequence number 688638515712 
2016-05-25T06:35:47.523115Z 0 [Note] InnoDB: Doing recovery: scanned up to log sequence number 688643758592 
2016-05-25T06:35:47.813625Z 0 [Note] InnoDB: Doing recovery: scanned up to log sequence number 688649001472 
2016-05-25T06:35:48.013840Z 0 [Note] InnoDB: Ignoring data file './dbowithrw/#sql-ib824219-1537447590.ibd' with space ID 8686. Another data file called ./dbowithrw/sureshprasad.ibd exists with the same space ID. 
2016-05-25T06:35:48.013907Z 0 [Note] InnoDB: Ignoring data file './dbowithrw/#sql-ib824219-1537447590.ibd' with space ID 8686. Another data file called ./dbowithrw/sureshprasad.ibd exists with the same space ID. 
2016-05-25T06:35:48.109329Z 0 [Note] InnoDB: Doing recovery: scanned up to log sequence number 688603126272 
2016-05-25T06:35:48.245377Z 0 [Note] InnoDB: Doing recovery: scanned up to log sequence number 688608369152 
2016-05-25T06:35:48.380703Z 0 [Note] InnoDB: Doing recovery: scanned up to log sequence number 688613612032 
2016-05-25T06:35:48.516794Z 0 [Note] InnoDB: Doing recovery: scanned up to log sequence number 688618854912 
2016-05-25T06:35:48.653082Z 0 [Note] InnoDB: Doing recovery: scanned up to log sequence number 688624097792 
2016-05-25T06:35:48.942457Z 0 [Note] InnoDB: Doing recovery: scanned up to log sequence number 688629340672 
2016-05-25T06:35:49.258740Z 0 [Note] InnoDB: Doing recovery: scanned up to log sequence number 688634583552 
2016-05-25T06:35:49.573738Z 0 [Note] InnoDB: Doing recovery: scanned up to log sequence number 688639826432 
2016-05-25T06:35:49.890260Z 0 [Note] InnoDB: Doing recovery: scanned up to log sequence number 688645069312 
2016-05-25T06:35:50.194665Z 0 [Note] InnoDB: Doing recovery: scanned up to log sequence number 688650312192 
2016-05-25T06:35:50.325541Z 0 [Note] InnoDB: Ignoring data file './dbowithrw/#sql-ib824219-1537447590.ibd' with space ID 8686. Another data file called ./dbowithrw/sureshprasad.ibd exists with the same space ID. 
2016-05-25T06:35:50.325606Z 0 [Note] InnoDB: Ignoring data file './dbowithrw/#sql-ib824219-1537447590.ibd' with space ID 8686. Another data file called ./dbowithrw/sureshprasad.ibd exists with the same space ID. 
2016-05-25T06:35:50.325619Z 0 [Note] InnoDB: Ignoring data file './dbowithrw/#sql-ib824219-1537447590.ibd' with space ID 8686. Another data file called ./dbowithrw/sureshprasad.ibd exists with the same space ID. 
2016-05-25T06:35:50.325628Z 0 [Note] InnoDB: Ignoring data file './dbowithrw/#sql-ib824219-1537447590.ibd' with space ID 8686. Another data file called ./dbowithrw/sureshprasad.ibd exists with the same space ID. 
2016-05-25T06:35:50.325840Z 0 [Note] InnoDB: Ignoring data file './dbowithrw/#sql-ib824219-1537447590.ibd' with space ID 8686. Another data file called ./dbowithrw/sureshprasad.ibd exists with the same space ID. 
2016-05-25T06:35:50.325891Z 0 [Note] InnoDB: Ignoring data file './dbowithrw/#sql-ib824219-1537447590.ibd' with space ID 8686. Another data file called ./dbowithrw/sureshprasad.ibd exists with the same space ID. 
2016-05-25T06:35:50.325924Z 0 [Note] InnoDB: Ignoring data file './dbowithrw/#sql-ib824219-1537447590.ibd' with space ID 8686. Another data file called ./dbowithrw/sureshprasad.ibd exists with the same space ID. 
2016-05-25T06:35:50.343396Z 0 [Note] InnoDB: Doing recovery: scanned up to log sequence number 688652957751 
2016-05-25T06:35:50.344666Z 0 [Note] InnoDB: Database was not shutdown normally! 
2016-05-25T06:35:50.344689Z 0 [Note] InnoDB: Starting crash recovery. 
2016-05-25T06:35:50.635987Z 0 [Note] InnoDB: Starting an apply batch of log records to the database... 
InnoDB: Progress in percent: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 
2016-05-25T06:35:51.610469Z 0 [Note] InnoDB: Apply batch completed 
2016-05-25T06:35:51.931405Z 0 [Note] InnoDB: Removed temporary tablespace data file: "ibtmp1" 
2016-05-25T06:35:51.931566Z 0 [Note] InnoDB: Creating shared tablespace for temporary tables 
2016-05-25T06:35:51.931607Z 0 [Note] InnoDB: Setting file './ibtmp1' size to 12 MB. Physically writing the file full; Please wait ... 
2016-05-25T06:35:51.980053Z 0 [Note] InnoDB: File './ibtmp1' size is now 12 MB. 
2016-05-25T06:35:51.980939Z 0 [Note] InnoDB: 96 redo rollback segment(s) found. 96 redo rollback segment(s) are active. 
2016-05-25T06:35:51.980966Z 0 [Note] InnoDB: 32 non-redo rollback segment(s) are active. 
2016-05-25T06:35:51.981311Z 0 [Note] InnoDB: Waiting for purge to start 
2016-05-25T06:35:52.031470Z 0 [Note] InnoDB: 5.7.12 started; log sequence number 688652957751 
2016-05-25T06:35:52.031491Z 0 [Note] InnoDB: page_cleaner: 1000ms intended loop took 6196ms. The settings might not be optimal. (flushed=0 and evicted=0, during the time.) 
2016-05-25T06:35:52.031700Z 0 [Note] InnoDB: Loading buffer pool(s) from /var/lib/mysql/ib_buffer_pool 
2016-05-25T06:35:52.031853Z 0 [Note] Plugin 'FEDERATED' is disabled. 
2016-05-25T06:35:52.036324Z 0 [Note] Found ca.pem, server-cert.pem and server-key.pem in data directory. Trying to enable SSL support using them. 
2016-05-25T06:35:52.036535Z 0 [Warning] CA certificate ca.pem is self signed. 
2016-05-25T06:35:52.037547Z 0 [Note] Server hostname (bind-address): '0.0.0.0'; port: 3306 
2016-05-25T06:35:52.037582Z 0 [Note] - '0.0.0.0' resolves to '0.0.0.0'; 
2016-05-25T06:35:52.037634Z 0 [Note] Server socket created on IP: '0.0.0.0'. 
2016-05-25T06:35:52.213332Z 0 [Note] Event Scheduler: Loaded 0 events 
2016-05-25T06:35:52.213498Z 0 [Note] /usr/sbin/mysqld: ready for connections. 
Version: '5.7.12' socket: '/var/run/mysqld/mysqld.sock' port: 3306 MySQL Community Server (GPL) 
2016-05-25T06:35:52.244629Z 2 [Warning] IP address '10.0.0.100' could not be resolved: Name or service not known 
2016-05-25T06:35:55.287910Z 7 [Warning] IP address '172.16.1.58' could not be resolved: Name or service not known 
2016-05-25T06:36:02.660844Z 0 [Note] InnoDB: Buffer pool(s) load completed at 160525 12:06:02 
2016-05-25T06:36:11.007067Z 14 [Warning] IP address '172.16.1.48' could not be resolved: Name or service not known 
2016-05-25T06:36:20.359394Z 13 [Note] Aborted connection 13 to db: 'dbowithrw' user: 'cwuser' host: '172.16.1.58' (Got an error reading communication packets) 
2016-05-25T06:38:22.358943Z 29 [Warning] IP address '172.16.3.72' could not be resolved: Name or service not known 
2016-05-25T06:38:51.591178Z 26 [Note] Aborted connection 26 to db: 'dbowithrw' user: 'cwuser' host: '172.16.1.58' (Got an error reading communication packets) 
2016-05-25T06:39:17.753741Z 34 [Warning] IP address '172.16.3.53' could not be resolved: Name or service not known 
2016-05-25T06:41:43.343490Z 39 [Warning] IP address '172.16.2.172' could not be resolved: Name or service not known 
2016-05-25T06:42:32.528345Z 43 [Warning] IP address '172.16.5.181' could not be resolved: Name or service not known 
2016-05-25T06:43:55.808222Z 49 [Warning] IP address '172.16.1.127' could not be resolved: Name or service not known 
2016-05-25T06:44:33.582066Z 51 [Warning] IP address '172.16.1.93' could not be resolved: Name or service not known 
2016-05-25T06:46:10.717352Z 56 [Warning] IP address '10.0.0.254' could not be resolved: Name or service not known 
2016-05-25T06:46:25.281681Z 57 [Warning] IP address '172.16.4.138' could not be resolved: Name or service not known 
2016-05-25T06:49:08.356412Z 78 [Warning] IP address '172.16.1.124' could not be resolved: Name or service not known 
2016-05-25T06:49:14.488339Z 79 [Warning] IP address '172.16.1.29' could not be resolved: Name or service not known 
2016-05-25T06:52:22.121133Z 88 [Warning] IP address '172.16.1.87' could not be resolved: Name or service not known 
2016-05-25T06:59:24.495151Z 81 [Note] Aborted connection 81 to db: 'dbowithrw' user: 'cwuser' host: '172.16.1.93' (Got an error reading communication packets) 
2016-05-25T07:01:49.481888Z 71 [Note] Aborted connection 71 to db: 'dbowithrw' user: 'cwuser' host: '10.0.0.100' (Got an error reading communication packets) 
2016-05-25T07:01:49.481936Z 70 [Note] Aborted connection 70 to db: 'dbowithrw' user: 'cwuser' host: '10.0.0.100' (Got an error reading communication packets) 
2016-05-25T07:01:49.486902Z 93 [Note] Aborted connection 93 to db: 'dbowithrw' user: 'cwuser' host: '10.0.0.100' (Got an error reading communication packets) 
2016-05-25T07:01:49.488708Z 62 [Note] Aborted connection 62 to db: 'dbowithrw' user: 'cwuser' host: '10.0.0.100' (Got an error reading communication packets) 
2016-05-25T07:01:49.488746Z 60 [Note] Aborted connection 60 to db: 'dbowithrw' user: 'cwuser' host: '10.0.0.100' (Got an error reading communication packets) 
2016-05-25T07:01:49.491444Z 53 [Note] Aborted connection 53 to db: 'dbowithrw' user: 'cwuser' host: '10.0.0.100' (Got an error reading communication packets) 
2016-05-25T07:01:49.491476Z 54 [Note] Aborted connection 54 to db: 'dbowithrw' user: 'cwuser' host: '10.0.0.100' (Got an error reading communication packets) 
2016-05-25T07:01:49.491550Z 72 [Note] Aborted connection 72 to db: 'dbowithrw' user: 'cwuser' host: '10.0.0.100' (Got an error reading communication packets) 
2016-05-25T07:01:49.492401Z 61 [Note] Aborted connection 61 to db: 'dbowithrw' user: 'cwuser' host: '10.0.0.100' (Got an error reading communication packets) 
2016-05-25T07:01:49.493221Z 63 [Note] Aborted connection 63 to db: 'dbowithrw' user: 'cwuser' host: '10.0.0.100' (Got an error reading communication packets) 
2016-05-25T07:01:49.496796Z 65 [Note] Aborted connection 65 to db: 'dbowithrw' user: 'cwuser' host: '10.0.0.100' (Got an error reading communication packets) 
2016-05-25T07:01:49.498087Z 69 [Note] Aborted connection 69 to db: 'dbowithrw' user: 'cwuser' host: '10.0.0.100' (Got an error reading communication packets) 
2016-05-25T07:01:49.498770Z 2 [Note] Aborted connection 2 to db: 'dbowithrw' user: 'cwuser' host: '10.0.0.100' (Got an error reading communication packets) 
2016-05-25T07:02:03.795662Z 122 [Warning] IP address '172.16.3.245' could not be resolved: Name or service not known 
2016-05-25T07:03:19.123593Z 110 [Note] Aborted connection 110 to db: 'dbowithrw' user: 'cwuser' host: '172.16.1.93' (Got an error reading communication packets) 
2016-05-25T07:04:45.370077Z 138 [Note] Aborted connection 138 to db: 'dbowithrw' user: 'cwuser' host: '172.16.1.93' (Got an error reading communication packets) 
2016-05-25T07:06:32.471694Z 145 [Warning] IP address '172.16.1.72' could not be resolved: Name or service not known 
2016-05-25T07:06:35.076698Z 103 [Note] Aborted connection 103 to db: 'dbowithrw' user: 'cwuser' host: '172.16.2.172' (Got an error reading communication packets) 
2016-05-25T07:06:35.076745Z 100 [Note] Aborted connection 100 to db: 'dbowithrw' user: 'cwuser' host: '172.16.2.172' (Got an error reading communication packets) 
2016-05-25T07:06:35.076849Z 104 [Note] Aborted connection 104 to db: 'dbowithrw' user: 'cwuser' host: '172.16.2.172' (Got an error reading communication packets) 
2016-05-25T07:06:35.076859Z 135 [Note] Aborted connection 135 to db: 'dbowithrw' user: 'cwuser' host: '172.16.2.172' (Got an error reading communication packets) 
2016-05-25T07:06:35.076919Z 105 [Note] Aborted connection 105 to db: 'dbowithrw' user: 'cwuser' host: '172.16.2.172' (Got an error reading communication packets) 
2016-05-25T07:06:35.077813Z 134 [Note] Aborted connection 134 to db: 'dbowithrw' user: 'cwuser' host: '172.16.2.172' (Got an error reading communication packets) 
2016-05-25T07:06:35.078668Z 111 [Note] Aborted connection 111 to db: 'dbowithrw' user: 'cwuser' host: '172.16.2.172' (Got an error reading communication packets) 
2016-05-25T07:06:35.079450Z 99 [Note] Aborted connection 99 to db: 'dbowithrw' user: 'cwuser' host: '172.16.2.172' (Got an error reading communication packets) 
07:08:48 UTC - mysqld got signal 11 ; 
This could be because you hit a bug. It is also possible that this binary 
or one of the libraries it was linked against is corrupt, improperly built, 
or misconfigured. This error can also be caused by malfunctioning hardware. 
Attempting to collect some information that could help diagnose the problem. 
As this is a crash and something is definitely wrong, the information 
collection process might fail. 

key_buffer_size=52428800 
read_buffer_size=20971520 
max_used_connections=72 
max_threads=214 
thread_count=58 
connection_count=58 
It is possible that mysqld could use up to 
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 8819493 K bytes of memory 
Hope that's ok; if not, decrease some variables in the equation. 

Thread pointer: 0x7fe5f4402670 
Attempting backtrace. You can use the following information to find out 
where mysqld died. If you see no messages after this, something went 
terribly wrong... 
stack_bottom = 7fe6b1d60e40 thread_stack 0x40000 
/usr/sbin/mysqld(my_print_stacktrace+0x2c)[0xebef8c] 
/usr/sbin/mysqld(handle_fatal_signal+0x451)[0x7acb61] 
/lib/x86_64-linux-gnu/libpthread.so.0(+0x10340)[0x7fe99f0de340] 

Trying to get some variables. 
Some pointers may be invalid and cause the dump to abort. 
Query (7fe5f590f5c0): is an invalid pointer 
Connection ID (thread ID): 102 
Status: NOT_KILLED 

Alle Hinweise oder helfen, wo wir gehen schief sehr geschätzt werden? Auch ein kleines Update, hatten wir die MySql von 5.7.8 RC-Version aktualisiert? Kann die Aufrüstung auch ein Problem sein, wenn ein Fehler dieses Typs auftritt?

Answer 1

Das Problem wurde durch Festlegen der Variablen in der my.cnf-Datei behoben. Die Variablen wurden mit Hilfe von My Sql Calculator berechnet, mit deren Hilfe ich die optimale Speichermenge für verschiedene Zwecke berechnen konnte. Einer der Fehler, der gemacht wurde, war, dass die Sortierpuffergröße auf 40 mb eingestellt wurde. Das Ergebnis ist sehr wenig von Verbindungen (< 270), während das DB-System insgesamt etwa 1200 Verbindungen benötigt. Das war eine große Erleichterung. Wir hatten dem innodb_buffer_pool_size auch 15GB Speicher gegeben.

Es gab ein anderes Problem mit den langsam laufenden Abfragen. In MS SQL wurden die meisten ausgewählten Abfragen in Tabellen with(nolock) ausgeführt. Wir hatten diese Änderung der globalen Ebene über die Konfiguration vorgenommen, indem wir die Konfiguration auf read uncommited gesetzt hatten (Standard ist repeatable read), die die Leistung der Abfragen erheblich gesteigert hatte. (Dies kann für viele andere nicht geeignet sein). Aber für uns hat es gut funktioniert.

Auch in den gespeicherten Prozeduren hat das Löschen der temporären Tabellen eine angemessene Arbeit geleistet. Früher hatten wir den falschen Eindruck, dass sobald die Verbindung von der Anwendung geschlossen wird, die temporäre Tabelle gelöscht wird, was sich als falsch herausstellte. Also hatten wir die erstellte temporäre Tabelle manuell gelöscht. (Wir verwendeten temporäre Tabellen, um die Funktionalität von Rang, dichtem Rang wie in SQL-Server zu emulieren). Damit konnten wir die Migration einigermaßen gut umsetzen. auf Ubuntu 14.04 LTS-Version

Answer 2

Ihre read_buffer_size von 20971520 * max_threads bedeutet, dass diese eine Speicheranforderung 4G der benötigten 8.819.493 K Bytes ist. Sagen Sie uns, wie viel Speicher Ihre Maschine hat, bitte. Da "read_buffer_size" sequenziell Tabellen abfragt, wäre eine mögliche sinnvolle Anfrage read_buffer_size = 1048576. Ein Scan von 10M Daten würde nur 10 Lesevorgänge erfordern. Wenn Sie globale Variablen anzeigen und globalen Status anzeigen könnten, könnten wir Ihnen besser helfen.