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The :program:`signal_handler` plugin provides low-level signal handling.
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.. _signal_handler_loading:
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This plugin is loaded by default and it should not be unloaded because the
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:doc:`/plugins/schema_engine/index` plugin depends on it.
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.. _signal_handler_version:
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This documentation applies to **signal_handler 0.1**.
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To see which version of the plugin a Drizzle server is running, execute:
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SELECT MODULE_VERSION FROM DATA_DICTIONARY.MODULES WHERE MODULE_NAME='signal_handler'