| Current Path : /home/usr.opt/mysql57/mysql-test/suite/perfschema/r/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : /home/usr.opt/mysql57/mysql-test/suite/perfschema/r/show_plugin.result |
================================================================================ SETUP ================================================================================ # Save the initial number of concurrent sessions # Save current SHOW_COMPATIBILITY_56 setting SELECT @@global.show_compatibility_56 INTO @show_compatibility_56_save; # # SET COMPATIBILITY MODE = OFF # SET @@global.show_compatibility_56 = OFF; # Verify EXAMPLE plugin is not loaded SELECT COUNT(*) = 0 AS "Expect 1" FROM information_schema.plugins WHERE plugin_name = "EXAMPLE"; Expect 1 1 # Create one session to force local and global system variables; connect con0, localhost, root,,; connection default; ================================================================================ TEST 1- NO PLUGIN VARS ================================================================================ SHOW GLOBAL STATUS LIKE "example_%"; Variable_name Value SHOW SESSION STATUS LIKE "example_%"; Variable_name Value SHOW GLOBAL VARIABLES LIKE "example_%"; Variable_name Value SHOW SESSION VARIABLES LIKE "example_%"; Variable_name Value SELECT variable_name, variable_value FROM performance_schema.global_status WHERE variable_name LIKE "example_%"; variable_name variable_value SELECT variable_name, variable_value FROM performance_schema.session_status WHERE variable_name LIKE "example_%"; variable_name variable_value SELECT variable_name, variable_value FROM performance_schema.global_variables WHERE variable_name LIKE "example_%"; variable_name variable_value SELECT variable_name, variable_value FROM performance_schema.session_variables WHERE variable_name LIKE "example_%"; variable_name variable_value ================================================================================ TEST 2 - PLUGIN LOAD, UNLOAD, RELOAD ================================================================================ ================================================================================ 2.1 - INSTALL PLUGIN ================================================================================ INSTALL PLUGIN example SONAME 'ha_example.so'; ================================================================================ 2.1a - FORCE SYNC OF LOCAL AND GLOBAL SYSTEM VARS ================================================================================ SHOW GLOBAL STATUS LIKE "example_%"; Variable_name Value example_func_example enum_var is 0, ulong_var is 8, double_var is 8.500000, really example_status_array_var1 100 example_status_array_var2 20.010000 example_status_var3 three hundred example_status_var4 ON example_status_var5 OFF example_status_var6 8250 SHOW SESSION STATUS LIKE "example_%"; Variable_name Value example_func_example enum_var is 0, ulong_var is 8, double_var is 8.500000, really example_status_array_var1 100 example_status_array_var2 20.010000 example_status_var3 three hundred example_status_var4 ON example_status_var5 OFF example_status_var6 8250 SHOW GLOBAL VARIABLES LIKE "example_%"; Variable_name Value example_double_thdvar 8.500000 example_double_var 8.500000 example_enum_var e1 example_ulong_var 8 SHOW SESSION VARIABLES LIKE "example_%"; Variable_name Value example_double_thdvar 8.500000 example_double_var 8.500000 example_enum_var e1 example_ulong_var 8 SELECT variable_name, variable_value FROM performance_schema.global_status WHERE variable_name LIKE "example_%"; variable_name variable_value example_func_example enum_var is 0, ulong_var is 8, double_var is 8.500000, really example_status_array_var1 100 example_status_array_var2 20.010000 example_status_var3 three hundred example_status_var4 ON example_status_var5 OFF example_status_var6 8250 SELECT variable_name, variable_value FROM performance_schema.session_status WHERE variable_name LIKE "example_%"; variable_name variable_value example_func_example enum_var is 0, ulong_var is 8, double_var is 8.500000, really example_status_array_var1 100 example_status_array_var2 20.010000 example_status_var3 three hundred example_status_var4 ON example_status_var5 OFF example_status_var6 8250 SELECT variable_name, variable_value FROM performance_schema.global_variables WHERE variable_name LIKE "example_%"; variable_name variable_value example_double_thdvar 8.500000 example_double_var 8.500000 example_enum_var e1 example_ulong_var 8 SELECT variable_name, variable_value FROM performance_schema.session_variables WHERE variable_name LIKE "example_%"; variable_name variable_value example_double_thdvar 8.500000 example_double_var 8.500000 example_enum_var e1 example_ulong_var 8 disconnect con0; ================================================================================ 2.2 - SET PLUGIN VARS ================================================================================ # GLOBAL SET GLOBAL example_ulong_var = 100; SET GLOBAL example_enum_var = e1; SET GLOBAL example_double_var = 100.9990; SET GLOBAL example_double_thdvar = 101.9991; # SESSION SET SESSION example_double_thdvar = 102.9992; ================================================================================ 2.3 - VERIFY UPDATED PLUGIN VARS ================================================================================ SHOW GLOBAL STATUS LIKE "example_%"; Variable_name Value example_func_example enum_var is 0, ulong_var is 100, double_var is 100.999000, really example_status_array_var1 100 example_status_array_var2 20.010000 example_status_var3 three hundred example_status_var4 ON example_status_var5 OFF example_status_var6 8250 SHOW SESSION STATUS LIKE "example_%"; Variable_name Value example_func_example enum_var is 0, ulong_var is 100, double_var is 100.999000, really example_status_array_var1 100 example_status_array_var2 20.010000 example_status_var3 three hundred example_status_var4 ON example_status_var5 OFF example_status_var6 8250 SHOW GLOBAL VARIABLES LIKE "example_%"; Variable_name Value example_double_thdvar 101.999100 example_double_var 100.999000 example_enum_var e1 example_ulong_var 100 SHOW SESSION VARIABLES LIKE "example_%"; Variable_name Value example_double_thdvar 102.999200 example_double_var 100.999000 example_enum_var e1 example_ulong_var 100 SELECT variable_name, variable_value FROM performance_schema.global_status WHERE variable_name LIKE "example_%"; variable_name variable_value example_func_example enum_var is 0, ulong_var is 100, double_var is 100.999000, really example_status_array_var1 100 example_status_array_var2 20.010000 example_status_var3 three hundred example_status_var4 ON example_status_var5 OFF example_status_var6 8250 SELECT variable_name, variable_value FROM performance_schema.session_status WHERE variable_name LIKE "example_%"; variable_name variable_value example_func_example enum_var is 0, ulong_var is 100, double_var is 100.999000, really example_status_array_var1 100 example_status_array_var2 20.010000 example_status_var3 three hundred example_status_var4 ON example_status_var5 OFF example_status_var6 8250 SELECT variable_name, variable_value FROM performance_schema.global_variables WHERE variable_name LIKE "example_%"; variable_name variable_value example_double_thdvar 101.999100 example_double_var 100.999000 example_enum_var e1 example_ulong_var 100 SELECT variable_name, variable_value FROM performance_schema.session_variables WHERE variable_name LIKE "example_%"; variable_name variable_value example_double_thdvar 102.999200 example_double_var 100.999000 example_enum_var e1 example_ulong_var 100 ================================================================================ 2.4 - UNINSTALL PLUGIN ================================================================================ UNINSTALL PLUGIN example; ================================================================================ 2.5 - VERIFY NO PLUGIN VARS ================================================================================ SHOW GLOBAL STATUS LIKE "example_%"; Variable_name Value SHOW SESSION STATUS LIKE "example_%"; Variable_name Value SHOW GLOBAL VARIABLES LIKE "example_%"; Variable_name Value SHOW SESSION VARIABLES LIKE "example_%"; Variable_name Value SELECT variable_name, variable_value FROM performance_schema.global_status WHERE variable_name LIKE "example_%"; variable_name variable_value SELECT variable_name, variable_value FROM performance_schema.session_status WHERE variable_name LIKE "example_%"; variable_name variable_value SELECT variable_name, variable_value FROM performance_schema.global_variables WHERE variable_name LIKE "example_%"; variable_name variable_value SELECT variable_name, variable_value FROM performance_schema.session_variables WHERE variable_name LIKE "example_%"; variable_name variable_value ================================================================================ 2.6 - REINSTALL PLUGIN ================================================================================ # Reinstall EXAMPLE plugin INSTALL PLUGIN example SONAME 'ha_example.so'; ================================================================================ 2.7 - SET PLUGIN VARS AGAIN ================================================================================ # GLOBAL SET GLOBAL example_ulong_var = 200; SET GLOBAL example_enum_var = e2; SET GLOBAL example_double_var = 200.8880; SET GLOBAL example_double_thdvar = 201.8881; # SESSION SET SESSION example_double_thdvar = 202.8882; ================================================================================ 2.8 - VERIFY PLUGIN VARS ================================================================================ SHOW GLOBAL STATUS LIKE "example_%"; Variable_name Value example_func_example enum_var is 1, ulong_var is 200, double_var is 200.888000, really example_status_array_var1 100 example_status_array_var2 20.010000 example_status_var3 three hundred example_status_var4 ON example_status_var5 OFF example_status_var6 8250 SHOW SESSION STATUS LIKE "example_%"; Variable_name Value example_func_example enum_var is 1, ulong_var is 200, double_var is 200.888000, really example_status_array_var1 100 example_status_array_var2 20.010000 example_status_var3 three hundred example_status_var4 ON example_status_var5 OFF example_status_var6 8250 SHOW GLOBAL VARIABLES LIKE "example_%"; Variable_name Value example_double_thdvar 201.888100 example_double_var 200.888000 example_enum_var e2 example_ulong_var 200 SHOW SESSION VARIABLES LIKE "example_%"; Variable_name Value example_double_thdvar 202.888200 example_double_var 200.888000 example_enum_var e2 example_ulong_var 200 SELECT variable_name, variable_value FROM performance_schema.global_status WHERE variable_name LIKE "example_%"; variable_name variable_value example_func_example enum_var is 1, ulong_var is 200, double_var is 200.888000, really example_status_array_var1 100 example_status_array_var2 20.010000 example_status_var3 three hundred example_status_var4 ON example_status_var5 OFF example_status_var6 8250 SELECT variable_name, variable_value FROM performance_schema.session_status WHERE variable_name LIKE "example_%"; variable_name variable_value example_func_example enum_var is 1, ulong_var is 200, double_var is 200.888000, really example_status_array_var1 100 example_status_array_var2 20.010000 example_status_var3 three hundred example_status_var4 ON example_status_var5 OFF example_status_var6 8250 SELECT variable_name, variable_value FROM performance_schema.global_variables WHERE variable_name LIKE "example_%"; variable_name variable_value example_double_thdvar 201.888100 example_double_var 200.888000 example_enum_var e2 example_ulong_var 200 SELECT variable_name, variable_value FROM performance_schema.session_variables WHERE variable_name LIKE "example_%"; variable_name variable_value example_double_thdvar 202.888200 example_double_var 200.888000 example_enum_var e2 example_ulong_var 200 ================================================================================ 2.9 - UNINSTALL PLUGIN ================================================================================ UNINSTALL PLUGIN example; ================================================================================ 2.10 - VERIFY NO PLUGIN VARS ================================================================================ SHOW GLOBAL STATUS LIKE "example_%"; Variable_name Value SHOW SESSION STATUS LIKE "example_%"; Variable_name Value SHOW GLOBAL VARIABLES LIKE "example_%"; Variable_name Value SHOW SESSION VARIABLES LIKE "example_%"; Variable_name Value SELECT variable_name, variable_value FROM performance_schema.global_status WHERE variable_name LIKE "example_%"; variable_name variable_value SELECT variable_name, variable_value FROM performance_schema.session_status WHERE variable_name LIKE "example_%"; variable_name variable_value SELECT variable_name, variable_value FROM performance_schema.global_variables WHERE variable_name LIKE "example_%"; variable_name variable_value SELECT variable_name, variable_value FROM performance_schema.session_variables WHERE variable_name LIKE "example_%"; variable_name variable_value ================================================================================ TEST 3 - SESSION PLUGIN VARS ON MULTIPLE CONNECTIONS ================================================================================ ================================================================================ 3.1 - INSTALL PLUGIN ================================================================================ INSTALL PLUGIN example SONAME 'ha_example.so'; ================================================================================ 3.2 - SET GLOBAL AND DEFAULT CONNECTION VARS ================================================================================ connection default; SET GLOBAL example_ulong_var = 300; SET GLOBAL example_enum_var = e1; SET GLOBAL example_double_var = 301.0000; SET GLOBAL example_double_thdvar = 302.0000; SET SESSION example_double_thdvar = 300.0000; ================================================================================ 3.3 - CONNECT 3 CLIENTS, SET LOCAL PLUGIN VARS ================================================================================ connect con1, localhost, root,,; SET SESSION example_double_thdvar = 300.1111; connect con2, localhost, root,,; SET SESSION example_double_thdvar = 300.2222; connect con3, localhost, root,,; SET SESSION example_double_thdvar = 300.3333; connection default; ================================================================================ 3.4 - VERIFY GLOBAL AND SESSION PLUGIN VARS ================================================================================ SHOW GLOBAL STATUS LIKE "example_%"; Variable_name Value example_func_example enum_var is 0, ulong_var is 300, double_var is 301.000000, really example_status_array_var1 100 example_status_array_var2 20.010000 example_status_var3 three hundred example_status_var4 ON example_status_var5 OFF example_status_var6 8250 SHOW SESSION STATUS LIKE "example_%"; Variable_name Value example_func_example enum_var is 0, ulong_var is 300, double_var is 301.000000, really example_status_array_var1 100 example_status_array_var2 20.010000 example_status_var3 three hundred example_status_var4 ON example_status_var5 OFF example_status_var6 8250 SHOW GLOBAL VARIABLES LIKE "example_%"; Variable_name Value example_double_thdvar 302.000000 example_double_var 301.000000 example_enum_var e1 example_ulong_var 300 SHOW SESSION VARIABLES LIKE "example_%"; Variable_name Value example_double_thdvar 300.000000 example_double_var 301.000000 example_enum_var e1 example_ulong_var 300 SELECT variable_name, variable_value FROM performance_schema.global_status WHERE variable_name LIKE "example_%"; variable_name variable_value example_func_example enum_var is 0, ulong_var is 300, double_var is 301.000000, really example_status_array_var1 100 example_status_array_var2 20.010000 example_status_var3 three hundred example_status_var4 ON example_status_var5 OFF example_status_var6 8250 SELECT variable_name, variable_value FROM performance_schema.session_status WHERE variable_name LIKE "example_%"; variable_name variable_value example_func_example enum_var is 0, ulong_var is 300, double_var is 301.000000, really example_status_array_var1 100 example_status_array_var2 20.010000 example_status_var3 three hundred example_status_var4 ON example_status_var5 OFF example_status_var6 8250 SELECT variable_name, variable_value FROM performance_schema.global_variables WHERE variable_name LIKE "example_%"; variable_name variable_value example_double_thdvar 302.000000 example_double_var 301.000000 example_enum_var e1 example_ulong_var 300 SELECT variable_name, variable_value FROM performance_schema.session_variables WHERE variable_name LIKE "example_%"; variable_name variable_value example_double_thdvar 300.000000 example_double_var 301.000000 example_enum_var e1 example_ulong_var 300 # Variables by thread SELECT variable_name, variable_value FROM performance_schema.variables_by_thread WHERE variable_name LIKE "example_%" ORDER BY variable_value; variable_name variable_value example_double_thdvar 300.000000 example_double_thdvar 300.111100 example_double_thdvar 300.222200 example_double_thdvar 300.333300 ================================================================================ 3.5 - DISCONNECT CLIENTS ================================================================================ connection con1; disconnect con1; connection con2; disconnect con2; connection con3; disconnect con3; connection default; ================================================================================ 3.6 - VERIFY SESSION VARS ARE REMOVED ================================================================================ SHOW GLOBAL STATUS LIKE "example_%"; Variable_name Value example_func_example enum_var is 0, ulong_var is 300, double_var is 301.000000, really example_status_array_var1 100 example_status_array_var2 20.010000 example_status_var3 three hundred example_status_var4 ON example_status_var5 OFF example_status_var6 8250 SHOW SESSION STATUS LIKE "example_%"; Variable_name Value example_func_example enum_var is 0, ulong_var is 300, double_var is 301.000000, really example_status_array_var1 100 example_status_array_var2 20.010000 example_status_var3 three hundred example_status_var4 ON example_status_var5 OFF example_status_var6 8250 SHOW GLOBAL VARIABLES LIKE "example_%"; Variable_name Value example_double_thdvar 302.000000 example_double_var 301.000000 example_enum_var e1 example_ulong_var 300 SHOW SESSION VARIABLES LIKE "example_%"; Variable_name Value example_double_thdvar 300.000000 example_double_var 301.000000 example_enum_var e1 example_ulong_var 300 SELECT variable_name, variable_value FROM performance_schema.global_status WHERE variable_name LIKE "example_%"; variable_name variable_value example_func_example enum_var is 0, ulong_var is 300, double_var is 301.000000, really example_status_array_var1 100 example_status_array_var2 20.010000 example_status_var3 three hundred example_status_var4 ON example_status_var5 OFF example_status_var6 8250 SELECT variable_name, variable_value FROM performance_schema.session_status WHERE variable_name LIKE "example_%"; variable_name variable_value example_func_example enum_var is 0, ulong_var is 300, double_var is 301.000000, really example_status_array_var1 100 example_status_array_var2 20.010000 example_status_var3 three hundred example_status_var4 ON example_status_var5 OFF example_status_var6 8250 SELECT variable_name, variable_value FROM performance_schema.global_variables WHERE variable_name LIKE "example_%"; variable_name variable_value example_double_thdvar 302.000000 example_double_var 301.000000 example_enum_var e1 example_ulong_var 300 SELECT variable_name, variable_value FROM performance_schema.session_variables WHERE variable_name LIKE "example_%"; variable_name variable_value example_double_thdvar 300.000000 example_double_var 301.000000 example_enum_var e1 example_ulong_var 300 # Variables by thread SELECT variable_name, variable_value FROM performance_schema.variables_by_thread WHERE variable_name LIKE "example_%" ORDER BY variable_value; variable_name variable_value example_double_thdvar 300.000000 ================================================================================ 3.7 - RECONNECT 3 CLIENTS, SET SESSION VARS FOR EACH ================================================================================ connect con1, localhost, root,,; SET SESSION example_double_thdvar = 311.1111; connect con2, localhost, root,,; SET SESSION example_double_thdvar = 322.2222; connect con3, localhost, root,,; SET SESSION example_double_thdvar = 333.3333; connection default; ================================================================================ 3.8 - VERIFY GLOBAL AND SESSION VARS ================================================================================ SHOW GLOBAL STATUS LIKE "example_%"; Variable_name Value example_func_example enum_var is 0, ulong_var is 300, double_var is 301.000000, really example_status_array_var1 100 example_status_array_var2 20.010000 example_status_var3 three hundred example_status_var4 ON example_status_var5 OFF example_status_var6 8250 SHOW SESSION STATUS LIKE "example_%"; Variable_name Value example_func_example enum_var is 0, ulong_var is 300, double_var is 301.000000, really example_status_array_var1 100 example_status_array_var2 20.010000 example_status_var3 three hundred example_status_var4 ON example_status_var5 OFF example_status_var6 8250 SHOW GLOBAL VARIABLES LIKE "example_%"; Variable_name Value example_double_thdvar 302.000000 example_double_var 301.000000 example_enum_var e1 example_ulong_var 300 SHOW SESSION VARIABLES LIKE "example_%"; Variable_name Value example_double_thdvar 300.000000 example_double_var 301.000000 example_enum_var e1 example_ulong_var 300 SELECT variable_name, variable_value FROM performance_schema.global_status WHERE variable_name LIKE "example_%"; variable_name variable_value example_func_example enum_var is 0, ulong_var is 300, double_var is 301.000000, really example_status_array_var1 100 example_status_array_var2 20.010000 example_status_var3 three hundred example_status_var4 ON example_status_var5 OFF example_status_var6 8250 SELECT variable_name, variable_value FROM performance_schema.session_status WHERE variable_name LIKE "example_%"; variable_name variable_value example_func_example enum_var is 0, ulong_var is 300, double_var is 301.000000, really example_status_array_var1 100 example_status_array_var2 20.010000 example_status_var3 three hundred example_status_var4 ON example_status_var5 OFF example_status_var6 8250 SELECT variable_name, variable_value FROM performance_schema.global_variables WHERE variable_name LIKE "example_%"; variable_name variable_value example_double_thdvar 302.000000 example_double_var 301.000000 example_enum_var e1 example_ulong_var 300 SELECT variable_name, variable_value FROM performance_schema.session_variables WHERE variable_name LIKE "example_%"; variable_name variable_value example_double_thdvar 300.000000 example_double_var 301.000000 example_enum_var e1 example_ulong_var 300 # Variables by thread SELECT variable_name, variable_value FROM performance_schema.variables_by_thread WHERE variable_name LIKE "example_%" ORDER BY variable_value; variable_name variable_value example_double_thdvar 300.000000 example_double_thdvar 311.111100 example_double_thdvar 322.222200 example_double_thdvar 333.333300 ================================================================================ 3.9 - UNINSTALL PLUGIN, LEAVE CLIENTS CONNECTED ================================================================================ UNINSTALL PLUGIN example; ================================================================================ 3.10 - VERIFY SESSION VARS ARE REMOVED ================================================================================ SHOW GLOBAL STATUS LIKE "example_%"; Variable_name Value SHOW SESSION STATUS LIKE "example_%"; Variable_name Value SHOW GLOBAL VARIABLES LIKE "example_%"; Variable_name Value SHOW SESSION VARIABLES LIKE "example_%"; Variable_name Value SELECT variable_name, variable_value FROM performance_schema.global_status WHERE variable_name LIKE "example_%"; variable_name variable_value SELECT variable_name, variable_value FROM performance_schema.session_status WHERE variable_name LIKE "example_%"; variable_name variable_value SELECT variable_name, variable_value FROM performance_schema.global_variables WHERE variable_name LIKE "example_%"; variable_name variable_value SELECT variable_name, variable_value FROM performance_schema.session_variables WHERE variable_name LIKE "example_%"; variable_name variable_value # VARIABLES BY THREAD SELECT variable_name, variable_value FROM performance_schema.variables_by_thread WHERE variable_name LIKE "example_%" ORDER BY variable_value; variable_name variable_value ================================================================================ 3.11 - DISCONNECT CLIENTS ================================================================================ connection con1; disconnect con1; connection con2; disconnect con2; connection con3; disconnect con3; connection default; ================================================================================ 3.12 - VERIFY CLIENTS ARE REMOVED ================================================================================ SHOW GLOBAL STATUS LIKE "example_%"; Variable_name Value SHOW SESSION STATUS LIKE "example_%"; Variable_name Value SHOW GLOBAL VARIABLES LIKE "example_%"; Variable_name Value SHOW SESSION VARIABLES LIKE "example_%"; Variable_name Value SELECT variable_name, variable_value FROM performance_schema.global_status WHERE variable_name LIKE "example_%"; variable_name variable_value SELECT variable_name, variable_value FROM performance_schema.session_status WHERE variable_name LIKE "example_%"; variable_name variable_value SELECT variable_name, variable_value FROM performance_schema.global_variables WHERE variable_name LIKE "example_%"; variable_name variable_value SELECT variable_name, variable_value FROM performance_schema.session_variables WHERE variable_name LIKE "example_%"; variable_name variable_value # VARIABLES BY THREAD SELECT variable_name, variable_value FROM performance_schema.variables_by_thread WHERE variable_name LIKE "example_%" ORDER BY variable_value; variable_name variable_value ================================================================================ TEST 4 - BUG#18008907: DEADLOCK WITH CHANGE_USER, SHOW VARIABLES, INSTALL PLUGIN ================================================================================ CREATE PROCEDURE install_no_such_plugin() BEGIN INSTALL PLUGIN no_such_plugin SONAME 'no_such_object'; END| CREATE PROCEDURE show_vars() BEGIN -- select on information_schema.global_variables -- will fail, still need to cover execution of the code -- to verify potential dead locks. declare continue handler for sqlexception begin end; SELECT COUNT(*) FROM information_schema.global_variables; SELECT COUNT(*) FROM performance_schema.global_variables; END| ================================================================================ 4.1 - DEADLOCK SCENARIO 1: con1 - has LOCK_system_variables_hash and waits on LOCK_plugin AND default - has LOCK_plugin and waits on LOCK_system_variables_hash ================================================================================ connect con1, localhost, root,,; SET DEBUG_SYNC='acquired_LOCK_system_variables_hash SIGNAL install_plugin WAIT_FOR cont_show_vars'; call show_vars();; connection default; SET DEBUG_SYNC='now WAIT_FOR install_plugin'; SET DEBUG_SYNC='acquired_LOCK_plugin SIGNAL cont_show_vars'; call install_no_such_plugin();; connection con1; # Without fix, reap will hang. COUNT(*) # SET DEBUG_SYNC='RESET'; connection default; ERROR HY000: Can't open shared library SET DEBUG_SYNC='RESET'; ================================================================================ 4.2 - DEADLOCK SCENARIO 2: default - has LOCK_system_variables_hash, waits on LOCK_global_system_variables con1 - has LOCK_plugin, waits on LOCK_system_variables_hash AND con2 - has LOCK_global_system_variables, waits on LOCK_plugin ================================================================================ SET DEBUG_SYNC='acquired_LOCK_system_variables_hash SIGNAL install_plugin WAIT_FOR nothing TIMEOUT 10'; call show_vars();; connection con1; SET DEBUG_SYNC='now WAIT_FOR install_plugin'; SET DEBUG_SYNC='acquired_LOCK_plugin SIGNAL create_connection WAIT_FOR nothing TIMEOUT 10'; call install_no_such_plugin();; connect con2, localhost, root,,; SET DEBUG_SYNC='now WAIT_FOR create_connection'; # Without fix, deadlock situation will occur on timeout of debug_syncs in # default and con1. Because of this, change_user operation hangs. change_user connection con1; ERROR HY000: Can't open shared library connection default; COUNT(*) # disconnect con2; ================================================================================ 4.3 - DEADLOCK SCENARIO 3: CONCURRENT SHOW VARIABLES AND UNINSTALL PLUGIN ================================================================================ # # INSTALL PLUGIN # INSTALL PLUGIN example SONAME 'ha_example.so'; connection con1; # Acquiring LOCK_system_variables_hash and LOCK_plugin_delete SET DEBUG_SYNC='acquired_LOCK_system_variables_hash SIGNAL uninstall_plugin WAIT_FOR go'; call show_vars();; connect con2, localhost, root,,; # # UNINSTALL PLUGIN # SET DEBUG_SYNC='now WAIT_FOR uninstall_plugin'; UNINSTALL PLUGIN example;; connection default; # Uninstall will wait until SHOW VARIABLES releases LOCK_plugin_delete. SET DEBUG_SYNC='now SIGNAL go'; # Connect con1 - reap connection con1; COUNT(*) # # Connect con2 - reap connection con2; ================================================================================ TEST 5 - BUG#22225549 MYSQL_CHANGE_USER/MYSQL_RESET_CONNECTION + SET INNODB... Update to plugin-defined session variable triggers resync with global variables and deadlocks on THD::LOCK_thd_sysvar. ================================================================================ SELECT @@global.show_compatibility_56; @@global.show_compatibility_56 0 select @@session.innodb_strict_mode; @@session.innodb_strict_mode 1 select user(), current_user(); user() current_user() root@localhost root@localhost change_user root # # Trigger a resync of session variables with global variables. # set @@session.innodb_strict_mode=off; # Restore set @@session.innodb_strict_mode=1; select @@session.innodb_strict_mode; @@session.innodb_strict_mode 1 ================================================================================ CLEAN UP ================================================================================ connection default; DROP PROCEDURE show_vars; DROP PROCEDURE install_no_such_plugin; SET DEBUG_SYNC='RESET'; disconnect con1; disconnect con2; # Restore SHOW_COMPATIBILITY_56 setting SET @@global.show_compatibility_56 = @show_compatibility_56_save; # Wait till we reached the initial number of concurrent sessions