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Doc: remove obsolete reference to recursive expression evaluation.
John Naylor Discussion: https://postgr.es/m/CAJVSVGUPH-0q5feP4v9b+Y8K3HGTn3bEd5KV7VbyUj-oFdSLzA@mail.gmail.com
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@ -1675,12 +1675,11 @@ include_dir 'conf.d'
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enforced by the kernel (as set by <literal>ulimit -s</literal> or local
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enforced by the kernel (as set by <literal>ulimit -s</literal> or local
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equivalent), less a safety margin of a megabyte or so. The safety
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equivalent), less a safety margin of a megabyte or so. The safety
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margin is needed because the stack depth is not checked in every
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margin is needed because the stack depth is not checked in every
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routine in the server, but only in key potentially-recursive routines
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routine in the server, but only in key potentially-recursive routines.
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such as expression evaluation. The default setting is two
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The default setting is two megabytes (<literal>2MB</literal>), which
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megabytes (<literal>2MB</literal>), which is conservatively small and
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is conservatively small and unlikely to risk crashes. However,
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unlikely to risk crashes. However, it might be too small to allow
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it might be too small to allow execution of complex functions.
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execution of complex functions. Only superusers can change this
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Only superusers can change this setting.
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setting.
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</para>
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</para>
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<para>
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<para>
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