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8885225de6
The patch is inspired from MySQL. Instead of using a single String to hold the current active debug_sync signal, use a Hash_set to store LEX_STRINGS. This patch ensures that a signal can not be lost, by being overwritten by another thread via set DEBUG_SYNC = '... SIGNAL ...'; All signals are kepts "alive" until they are consumed by a wait event. This requires updating test cases that assume the GLOBAL signal is never consumed. Follow-up work needed: Port the additional syntax that allows one to set multiple signals and also conditionally deactivate signals when waiting.
94 lines
2.4 KiB
Plaintext
94 lines
2.4 KiB
Plaintext
select * from information_schema.system_variables
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where variable_name like 'debug%'
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order by variable_name;
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VARIABLE_NAME DEBUG
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SESSION_VALUE
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GLOBAL_VALUE
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GLOBAL_VALUE_ORIGIN COMPILE-TIME
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DEFAULT_VALUE
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VARIABLE_SCOPE SESSION
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VARIABLE_TYPE VARCHAR
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VARIABLE_COMMENT Built-in DBUG debugger
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NUMERIC_MIN_VALUE NULL
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NUMERIC_MAX_VALUE NULL
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NUMERIC_BLOCK_SIZE NULL
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ENUM_VALUE_LIST NULL
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READ_ONLY NO
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COMMAND_LINE_ARGUMENT OPTIONAL
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GLOBAL_VALUE_PATH NULL
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VARIABLE_NAME DEBUG_BINLOG_FSYNC_SLEEP
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SESSION_VALUE NULL
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GLOBAL_VALUE 314
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GLOBAL_VALUE_ORIGIN COMMAND-LINE
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DEFAULT_VALUE 0
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VARIABLE_SCOPE GLOBAL
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VARIABLE_TYPE BIGINT UNSIGNED
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VARIABLE_COMMENT Extra sleep (in microseconds) to add to binlog fsync(), for debugging
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NUMERIC_MIN_VALUE 0
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NUMERIC_MAX_VALUE 4294967295
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NUMERIC_BLOCK_SIZE 1
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ENUM_VALUE_LIST NULL
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READ_ONLY NO
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COMMAND_LINE_ARGUMENT REQUIRED
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GLOBAL_VALUE_PATH NULL
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VARIABLE_NAME DEBUG_DBUG
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SESSION_VALUE
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GLOBAL_VALUE
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GLOBAL_VALUE_ORIGIN COMPILE-TIME
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DEFAULT_VALUE
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VARIABLE_SCOPE SESSION
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VARIABLE_TYPE VARCHAR
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VARIABLE_COMMENT Built-in DBUG debugger
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NUMERIC_MIN_VALUE NULL
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NUMERIC_MAX_VALUE NULL
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NUMERIC_BLOCK_SIZE NULL
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ENUM_VALUE_LIST NULL
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READ_ONLY NO
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COMMAND_LINE_ARGUMENT OPTIONAL
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GLOBAL_VALUE_PATH NULL
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VARIABLE_NAME DEBUG_MUTEX_DEADLOCK_DETECTOR
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SESSION_VALUE NULL
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GLOBAL_VALUE ON
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GLOBAL_VALUE_ORIGIN COMPILE-TIME
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DEFAULT_VALUE ON
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VARIABLE_SCOPE GLOBAL
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VARIABLE_TYPE BOOLEAN
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VARIABLE_COMMENT Enable checking of wrong mutex usage
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NUMERIC_MIN_VALUE NULL
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NUMERIC_MAX_VALUE NULL
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NUMERIC_BLOCK_SIZE NULL
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ENUM_VALUE_LIST OFF,ON
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READ_ONLY YES
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COMMAND_LINE_ARGUMENT OPTIONAL
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GLOBAL_VALUE_PATH NULL
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VARIABLE_NAME DEBUG_NO_THREAD_ALARM
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SESSION_VALUE NULL
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GLOBAL_VALUE OFF
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GLOBAL_VALUE_ORIGIN COMPILE-TIME
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DEFAULT_VALUE OFF
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VARIABLE_SCOPE GLOBAL
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VARIABLE_TYPE BOOLEAN
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VARIABLE_COMMENT Disable system thread alarm calls. Disabling it may be useful in debugging or testing, never do it in production
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NUMERIC_MIN_VALUE NULL
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NUMERIC_MAX_VALUE NULL
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NUMERIC_BLOCK_SIZE NULL
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ENUM_VALUE_LIST OFF,ON
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READ_ONLY YES
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COMMAND_LINE_ARGUMENT OPTIONAL
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GLOBAL_VALUE_PATH NULL
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VARIABLE_NAME DEBUG_SYNC
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SESSION_VALUE ON - current signals: ''
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GLOBAL_VALUE NULL
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GLOBAL_VALUE_ORIGIN COMPILE-TIME
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DEFAULT_VALUE
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VARIABLE_SCOPE SESSION ONLY
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VARIABLE_TYPE VARCHAR
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VARIABLE_COMMENT Debug Sync Facility
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NUMERIC_MIN_VALUE NULL
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NUMERIC_MAX_VALUE NULL
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NUMERIC_BLOCK_SIZE NULL
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ENUM_VALUE_LIST NULL
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READ_ONLY NO
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COMMAND_LINE_ARGUMENT NULL
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GLOBAL_VALUE_PATH NULL
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