Thank you for the report. Verified as described. 12:21:55 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. Please help us make Percona Server better by reporting any bugs at http://bugs.percona.com/ key_buffer_size=1048576 read_buffer_size=131072 max_used_connections=4 max_threads=152 thread_count=3 connection_count=3 It is possible that mysqld could use up to key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 61227 K bytes of memory Hope that's ok; if not, decrease some variables in the equation. Thread pointer: 0x7f9fe8129180 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 = 7fa034faee18 thread_stack 0x40000 /home/sveta/build/ps-5.7/bin/mysqld(my_print_stacktrace+0x47)[0x19d067d] /home/sveta/build/ps-5.7/bin/mysqld(handle_fatal_signal+0x440)[0xf56959] /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7fa03c5db390] /usr/lib/x86_64-linux-gnu/libstdc++.so.6(__dynamic_cast+0x23)[0x7fa03c2ce413] /home/sveta/build/ps-5.7/bin/mysqld(_Z9down_castIP10Field_blobP5FieldET_T0_+0x30)[0x10022b7] /home/sveta/build/ps-5.7/bin/mysqld(_Z25mysql_prepare_blob_valuesP3THDR4ListI4ItemEP11st_mem_root+0x2ad)[0x18a5fe1] /home/sveta/build/ps-5.7/bin/mysqld(_Z12write_recordP3THDP5TABLEP9COPY_INFOS4_+0x67e)[0x18a985a] /home/sveta/build/ps-5.7/bin/mysqld(_ZN14Sql_cmd_insert12mysql_insertEP3THDP10TABLE_LIST+0xf09)[0x18a6fc9] /home/sveta/build/ps-5.7/bin/mysqld(_ZN14Sql_cmd_insert7executeEP3THD+0x19f)[0x18ae0bb] /home/sveta/build/ps-5.7/bin/mysqld(_Z21mysql_execute_commandP3THDb+0x320a)[0x166b9bd] /home/sveta/build/ps-5.7/bin/mysqld(_ZN13sp_instr_stmt9exec_coreEP3THDPj+0x7a)[0x15aa494] /home/sveta/build/ps-5.7/bin/mysqld(_ZN12sp_lex_instr23reset_lex_and_exec_coreEP3THDPjb+0x627)[0x15a8fa1] /home/sveta/build/ps-5.7/bin/mysqld(_ZN12sp_lex_instr29validate_lex_and_execute_coreEP3THDPjb+0x16a)[0x15a9b30] /home/sveta/build/ps-5.7/bin/mysqld(_ZN13sp_instr_stmt7executeEP3THDPj+0x2db)[0x15aa0f9] /home/sveta/build/ps-5.7/bin/mysqld(_ZN7sp_head7executeEP3THDb+0x7a4)[0x15a1f5a] /home/sveta/build/ps-5.7/bin/mysqld(_ZN7sp_head17execute_procedureEP3THDP4ListI4ItemE+0x94f)[0x15a4157] /home/sveta/build/ps-5.7/bin/mysqld(_Z21mysql_execute_commandP3THDb+0x67d1)[0x166ef84] /home/sveta/build/ps-5.7/bin/mysqld(_ZN13sp_instr_stmt9exec_coreEP3THDPj+0x7a)[0x15aa494] /home/sveta/build/ps-5.7/bin/mysqld(_ZN12sp_lex_instr23reset_lex_and_exec_coreEP3THDPjb+0x627)[0x15a8fa1] /home/sveta/build/ps-5.7/bin/mysqld(_ZN12sp_lex_instr29validate_lex_and_execute_coreEP3THDPjb+0x16a)[0x15a9b30] /home/sveta/build/ps-5.7/bin/mysqld(_ZN13sp_instr_stmt7executeEP3THDPj+0x2db)[0x15aa0f9] /home/sveta/build/ps-5.7/bin/mysqld(_ZN7sp_head7executeEP3THDb+0x7a4)[0x15a1f5a] /home/sveta/build/ps-5.7/bin/mysqld(_ZN7sp_head17execute_procedureEP3THDP4ListI4ItemE+0x94f)[0x15a4157] /home/sveta/build/ps-5.7/bin/mysqld(_Z21mysql_execute_commandP3THDb+0x67d1)[0x166ef84] /home/sveta/build/ps-5.7/bin/mysqld(_Z11mysql_parseP3THDP12Parser_state+0x720)[0x167209e] /home/sveta/build/ps-5.7/bin/mysqld(_Z16dispatch_commandP3THDPK8COM_DATA19enum_server_command+0xcf6)[0x1665eb1] /home/sveta/build/ps-5.7/bin/mysqld(_Z10do_commandP3THD+0x59e)[0x1664c52] /home/sveta/build/ps-5.7/bin/mysqld(handle_connection+0x2b1)[0x17b6a6c] /home/sveta/build/ps-5.7/bin/mysqld(pfs_spawn_thread+0x173)[0x1ecce49] /lib/x86_64-linux-gnu/libpthread.so.0(+0x76ba)[0x7fa03c5d16ba] /lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7fa03ba5d82d] Trying to get some variables. Some pointers may be invalid and cause the dump to abort. Query (7f9fe81b6b20): INSERT INTO tablica_s_govnom(pri1, DT, dop1) VALUES(pri1, NOW() ,dop1_1) ON DUPLICATE KEY UPDATE DT=NOW(), dop1=VALUES(dop1) Connection ID (thread ID): 62 Status: NOT_KILLED