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35 lines
1.3 KiB
Plaintext
35 lines
1.3 KiB
Plaintext
SQL Language Extension: ALTER DATABASE SET/DROP LINGER
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Implements capability to manage database linger.
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Author:
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Alex Peshkoff <peshkoff@mail.ru>
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Syntax is:
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ALTER DATABASE SET LINGER TO {seconds};
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ALTER DATABASE DROP LINGER;
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Description:
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Makes it possible to set and clear linger value for database.
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Database linger makes engine (when running in SS mode) do not close database immediately after
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last attachment is closed. This helps to increase performance when database is often opened/closed
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with almost zero price.
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To set linger for database do:
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ALTER DATABASE SET LINGER TO 30; -- will set linger interval to 30 seconds
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To reset linger for database do:
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ALTER DATABASE DROP LINGER; -- will make engine do not delay closing given database
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ALTER DATABASE SET LINGER TO 0; -- another way to clean linger settings
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Notice.
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Sometimes it may be useful to turn off linger once to force server to close some database not
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shutting it down. Dropping linger for it is not good solution - you will have to turn it on
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manually later. To perform this task it's better to use GFIX utility with new switch 'NOLinger' -
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it makes database be closed immediately when last attachment is gone no matter of linger interval
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set in database. Next time linger will work normally. Services API is also available for it -
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see details in README.services_extension).
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