1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
<?xml version="1.0" encoding="ISO-8859-1"?>
<!--
-
- This file is part of the OpenLink Software Virtuoso Open-Source (VOS)
- project.
-
- Copyright (C) 1998-2018 OpenLink Software
-
- This project is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by the
- Free Software Foundation; only version 2 of the License, dated June 1991.
-
- This program is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License along
- with this program; if not, write to the Free Software Foundation, Inc.,
- 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-
-->
<refentry id="fn_dbf_set">
<refmeta>
<refentrytitle>__dbf_set</refentrytitle>
<refmiscinfo>admin</refmiscinfo>
</refmeta>
<refnamediv>
<refname>__dbf_set</refname>
<refpurpose>Sets vector execution parameters.</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis id="fsyn___dbf_set">
<funcprototype id="fproto___dbf_set">
<funcdef><function>__dbf_set</function></funcdef>
<paramdef>in <parameter>flag_name</parameter> varchar</paramdef>
<paramdef>out<parameter>flag_value</parameter> any</paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1 id="desc___dbf_set">
<title>Description</title>
<para>Sets at run time by a dba group user the vector execution parameters.</para>
</refsect1>
<refsect1 id="params___dbf_set">
<title>Parameters</title>
<refsect2><title>flag_name</title>
<para>Name of the flag.</para>
<para>For Configuring Vectored Execution, should be used the following values:</para>
<para>Note: Only effective with Virtuoso 7.0 and later.</para>
<itemizedlist mark="bullet">
<listitem><emphasis>dc_batch_sz</emphasis>: flag for ini parameter VectorSize;</listitem>
<listitem><emphasis>dc_max_batch_sz</emphasis>: flag for ini parameter MaxVectorSize;</listitem>
<listitem><emphasis>enable_dyn_batch_sz</emphasis>: flag for ini parameter AdjustVectorSize;</listitem>
<listitem><emphasis>enable_qp</emphasis>: flag for ini parameter ThreadsPerQuery;</listitem>
<listitem><emphasis>aq_max_threads</emphasis>: flag for ini parameter AsyncQueueMaxThreads;</listitem>
</itemizedlist>
</refsect2>
<refsect2><title>flag_value</title>
<para>Value of the flag.</para>
</refsect2>
</refsect1>
<refsect1 id="examples___dbf_set">
<title>Examples</title>
<example id="ex___dbf_set"><title>Simple Use</title>
<para>Set the maximum number of outstanding parallel work units to 16:</para>
<programlisting><![CDATA[
SQL> __dbf_set ('enable_qp', 16);
]]></programlisting>
</example>
</refsect1>
</refentry>
|
