mirror of https://github.com/tLDP/LDP
updated
This commit is contained in:
gferg
parent
a1a7869a40
commit
755ed6b05c
|
|
@ -9,11 +9,12 @@
|
|||
<authorinitials>dbs</authorinitials>
|
||||
<revhistory>
|
||||
<revision>
|
||||
<revnumber>0.7</revnumber>
|
||||
<date>May 26, 2000</date>
|
||||
<revnumber>1.1</revnumber>
|
||||
<date>July 28, 2000</date>
|
||||
<authorinitials>dbs</authorinitials>
|
||||
<revremark>Based on DB2 V7.1 beta release, wrote install instructions for
|
||||
Caldera 2.4, Red Hat 6.2, SuSE 6.2, SuSE 6.3, and TurboLinux 6.0.</revremark>
|
||||
<revremark>Documented _SHM_ID_BITS kernel parameter tuning for increasing
|
||||
number of available connections. Added basic indexing.
|
||||
</revremark>
|
||||
</revision>
|
||||
<revision>
|
||||
<revnumber>1.0</revnumber>
|
||||
|
|
@ -23,6 +24,13 @@
|
|||
grammatical mistakes. Licensed document under GNU GPL. Submitted document to LDP.
|
||||
</revremark>
|
||||
</revision>
|
||||
<revision>
|
||||
<revnumber>0.7</revnumber>
|
||||
<date>May 26, 2000</date>
|
||||
<authorinitials>dbs</authorinitials>
|
||||
<revremark>Based on DB2 V7.1 beta release, wrote install instructions for
|
||||
Caldera 2.4, Red Hat 6.2, SuSE 6.2, SuSE 6.3, and TurboLinux 6.0.</revremark>
|
||||
</revision>
|
||||
</revhistory>
|
||||
<abstract>
|
||||
|
||||
|
|
@ -236,6 +244,9 @@ suffering the wrath of his girlfriend.
|
|||
<sect2>
|
||||
<title>What are prerequisites?</title>
|
||||
|
||||
<indexterm><primary>installation prerequisites</primary></indexterm>
|
||||
<indexterm><primary>prerequisites for installation</primary></indexterm>
|
||||
|
||||
<para>
|
||||
Prerequisites are what you, your machine, and your distribution
|
||||
require before you will be able to successfully install or use DB2.
|
||||
|
|
@ -397,7 +408,12 @@ and get the IBM Developer Kit for Java.
|
|||
</varlistentry>
|
||||
|
||||
<varlistentry>
|
||||
<term>Web browser</term>
|
||||
<term>
|
||||
|
||||
<indexterm><primary>browser prerequisite</primary></indexterm>
|
||||
<indexterm><primary>web browser prerequisite</primary></indexterm>
|
||||
|
||||
Web browser</term>
|
||||
<listitem>
|
||||
<para>
|
||||
DB2 calls the <command>netscape</command> command when you:
|
||||
|
|
@ -1814,6 +1830,8 @@ while installing DB2, creating an instance, or using a DB2 database.
|
|||
<sect2 id="tsinstall">
|
||||
<title>Problems with DB2 installation</title>
|
||||
|
||||
<indexterm><primary>installation</primary><secondary>troubleshooting</secondary></indexterm>
|
||||
|
||||
<para>
|
||||
The following section covers some of the common problems you may encounter
|
||||
when you install DB2.
|
||||
|
|
@ -1870,6 +1888,10 @@ To update all existing DB2 instances, issue the following command as root:
|
|||
|
||||
<sect2>
|
||||
<title>Problems creating a DB2 instance</title>
|
||||
|
||||
<indexterm><primary>instance creation</primary><secondary>troubleshooting</secondary></indexterm>
|
||||
<indexterm><primary>creating DB2 instances</primary><secondary>troubleshooting</secondary></indexterm>
|
||||
|
||||
<para>
|
||||
The following section covers some of the common problems you may encounter
|
||||
when you create a DB2 instance.
|
||||
|
|
@ -1980,6 +2002,10 @@ The following section covers some of the common problems you may encounter
|
|||
when you use a DB2 database.
|
||||
</para>
|
||||
|
||||
|
||||
<indexterm><primary>connection</primary><secondary>troubleshooting</secondary></indexterm>
|
||||
<indexterm><primary>kernel</primary><secondary>optimizing parameters</secondary></indexterm>
|
||||
|
||||
<qandaset>
|
||||
<qandaentry>
|
||||
<question>
|
||||
|
|
@ -1988,9 +2014,37 @@ when you use a DB2 database.
|
|||
|
||||
<answer>
|
||||
<para>
|
||||
The number of connections that DB2 can support depends on two <literal>#define</literal>
|
||||
variables included in the kernel source header files.
|
||||
The number of connections that DB2 can support depends on three <literal>#define</literal>
|
||||
variables included in the kernel source header files. Following the description of these
|
||||
variables is a table listing the default values by distribution. The table includes the values
|
||||
of these variables in the updated kernel packages for each distribution.
|
||||
<variablelist>
|
||||
<varlistentry>
|
||||
<term>_SHM_ID_BITS</term>
|
||||
<listitem>
|
||||
<para>
|
||||
This variable, defined in <filename>/usr/src/linux/include/asm/shmparam.h</filename>,
|
||||
determines the number of shared memory segment identifiers available to Linux. The
|
||||
default value for <literal>_SHM_ID_BITS</literal> in the kernel source
|
||||
is <literal>7</literal>, which allows for a total of 2^7, or 128,
|
||||
shared memory segment identifiers.
|
||||
</para>
|
||||
<para>
|
||||
On a single-processor machine, DB2 itself uses a set number (~15) of
|
||||
shared memory segment identifiers. On a machine with multiple processors,
|
||||
DB2 also requires one shared memory segment identifier per agent to take
|
||||
advantage of the Fast Communication Manager (<acronym>FCM</acronym>) feature
|
||||
of DB2. Because each DB2 connection requires one agent per processor,
|
||||
on a quad-processor machine the default value of <literal>_SHM_ID_BITS</literal>
|
||||
allows less than 32 simultaneous connections to a DB2 instance.
|
||||
</para>
|
||||
<para>
|
||||
If you recompile the kernel yourself, you should be able to safely
|
||||
increase this value to <literal>9</literal>.
|
||||
</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
|
||||
<varlistentry>
|
||||
<term>NR_TASKS</term>
|
||||
<listitem>
|
||||
|
|
@ -2007,12 +2061,11 @@ The default value for <literal>NR_TASKS</literal> in the kernel source is <liter
|
|||
allowing a maximum of 256 simultaneous connections to a single DB2 instance.
|
||||
DB2 itself requires a few connections for overhead processes.
|
||||
If you recompile the kernel yourself, you should increase this value to something like 2048.
|
||||
Thankfully, the stock kernels shipped with the Red Hat 6.1, Red Hat 6.2, SuSE 6.2, SuSE 6.3, and
|
||||
TurboLinux 6.0 distributions set the value of <literal>NR_TASKS</literal> to
|
||||
<literal>2560</literal>, thus allowing 1280 connections for a single DB2 instance.
|
||||
However, Caldera OpenLinux 2.4 ships with a kernel in which <literal>NR_TASKS</literal>
|
||||
is set to the default value of 512. Caldera users may want to consider recompiling the
|
||||
kernel.
|
||||
The stock kernels shipped with the Red Hat, SuSE, and TurboLinux distributions
|
||||
increase the value of <literal>NR_TASKS</literal> to 2560 or above.
|
||||
However, Caldera OpenLinux eDesktop 2.4 ships with a kernel in which <literal>NR_TASKS</literal>
|
||||
is set to the default value of 512. Caldera users should increase the value
|
||||
of this variable and recompile the kernel.
|
||||
</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
|
|
@ -2033,21 +2086,114 @@ The default value for <literal>SEMMNI</literal> in the kernel source is <literal
|
|||
which, on a quad-processor machine, will only allow 32 simultaneous connections to a DB2 instance.
|
||||
If you recompile the kernel yourself, increase this value to something like 1024.
|
||||
</para>
|
||||
<para>
|
||||
<note>
|
||||
<para>
|
||||
To be added: the value of this variable in the stock kernels shipped with the Caldera OpenLinux 2.4,
|
||||
Red Hat 6.2, SuSE 6.2, SuSE 6.3, and TurboLinux 6.0 distributions.
|
||||
</para>
|
||||
</note>
|
||||
</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
|
||||
</variablelist>
|
||||
</para>
|
||||
|
||||
|
||||
<indexterm><primary>kernel</primary><secondary>parameter defaults</secondary></indexterm>
|
||||
|
||||
<table frame="all">
|
||||
<title>Default kernel parameter values, by distribution</title>
|
||||
<tgroup cols="6" align="center" colsep="1" rowsep="1">
|
||||
<colspec colname="c1">
|
||||
<colspec colname="c2">
|
||||
<colspec colname="c3">
|
||||
<colspec colname="c4">
|
||||
<colspec colname="c5">
|
||||
<colspec colname="c6">
|
||||
<colspec colname="c7">
|
||||
<thead>
|
||||
<row>
|
||||
<entry>Kernel Parameter</entry>
|
||||
<entry>Kernel Source</entry>
|
||||
<entry>Caldera OpenLinux eDesktop 2.4</entry>
|
||||
<entry>Caldera OpenLinux eServer 2.3</entry>
|
||||
<entry>Red Hat 6.2</entry>
|
||||
<entry>SuSE 6.2</entry>
|
||||
<entry>SuSE 6.3</entry>
|
||||
<entry>TurboLinux 6.0</entry>
|
||||
</row>
|
||||
</thead>
|
||||
<tbody>
|
||||
<row>
|
||||
<entry>_SHM_ID_BITS</entry>
|
||||
<entry><literal>7</literal></entry>
|
||||
<entry><literal>7</literal></entry>
|
||||
<entry><literal>7</literal></entry>
|
||||
<entry><simplelist type="horiz" columns="2">
|
||||
<member>kernel-2.2.14-5</member>
|
||||
<member><literal>7</literal></member>
|
||||
<member>kernel-2.2.14-12</member>
|
||||
<member><literal>9</literal></member>
|
||||
<member>kernel-2.2.16-3</member>
|
||||
<member><literal>9</literal></member>
|
||||
</simplelist></entry>
|
||||
<entry>Unknown</entry>
|
||||
<entry>Unknown</entry>
|
||||
<entry><simplelist type="horiz" columns="2">
|
||||
<member>kernel-2.2.14-5</member>
|
||||
<member><literal>7</literal></member>
|
||||
<member>kernel-2.2.16-0.4</member>
|
||||
<member><literal>7</literal></member>
|
||||
</simplelist></entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>NR_TASKS</entry>
|
||||
<entry><literal>512</literal></entry>
|
||||
<entry><literal>512</literal></entry>
|
||||
<entry><literal>512</literal></entry>
|
||||
<entry><simplelist type="horiz" columns="2">
|
||||
<member>kernel-2.2.14-5</member>
|
||||
<member><literal>2560</literal></member>
|
||||
<member>kernel-2.2.14-12</member>
|
||||
<member><literal>2560</literal></member>
|
||||
<member>kernel-2.2.16-3</member>
|
||||
<member><literal>4090</literal></member>
|
||||
</simplelist></entry>
|
||||
<entry>Unknown</entry>
|
||||
<entry>Unknown</entry>
|
||||
<entry><simplelist type="horiz" columns="2">
|
||||
<member>kernel-2.2.14-5</member>
|
||||
<member><literal>2560</literal></member>
|
||||
<member>kernel-2.2.16-0.4</member>
|
||||
<member><literal>2560</literal></member>
|
||||
</simplelist></entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>SEMMNI</entry>
|
||||
<entry><literal>128</literal></entry>
|
||||
<entry><literal>128</literal></entry>
|
||||
<entry><literal>128</literal></entry>
|
||||
<entry><simplelist type="horiz" columns="2">
|
||||
<member>kernel-2.2.14-5</member>
|
||||
<member><literal>128</literal></member>
|
||||
<member>kernel-2.2.14-12</member>
|
||||
<member><literal>512</literal></member>
|
||||
<member>kernel-2.2.16-3</member>
|
||||
<member><literal>512</literal></member>
|
||||
</simplelist></entry>
|
||||
<entry>Unknown</entry>
|
||||
<entry>Unknown</entry>
|
||||
<entry><simplelist type="horiz" columns="2">
|
||||
<member>kernel-2.2.14-5</member>
|
||||
<member><literal>128</literal></member>
|
||||
<member>kernel-2.2.16-0.4</member>
|
||||
<member><literal>128</literal></member>
|
||||
</simplelist></entry>
|
||||
</row>
|
||||
</tbody>
|
||||
</tgroup>
|
||||
</table>
|
||||
|
||||
</answer>
|
||||
</qandaentry>
|
||||
|
||||
|
||||
<indexterm><primary>Control Center</primary><secondary>troubleshooting</secondary></indexterm>
|
||||
|
||||
<qandaentry>
|
||||
<question>
|
||||
<para><emphasis>When I start the DB2 Control Center, I get a message box with the
|
||||
|
|
@ -2056,7 +2202,7 @@ error <computeroutput>SQL1042C An unexpected system error occurred.</computerout
|
|||
</question>
|
||||
<answer>
|
||||
<para>
|
||||
This error occurs only the first time you start the Control Center. Note that
|
||||
On most systems, this error occurs only the first time you start the Control Center. Note that
|
||||
the message box may be mostly covered up by the pretty DB2 splash screen;
|
||||
if this is the case, you have to move the error message window down
|
||||
and press the "Close" button. The Control Center then starts correctly, and you should
|
||||
|
|
@ -2065,6 +2211,9 @@ not get the error message again.
|
|||
</answer>
|
||||
</qandaentry>
|
||||
|
||||
|
||||
<indexterm><primary>Control Center</primary><secondary>troubleshooting</secondary></indexterm>
|
||||
|
||||
<qandaentry>
|
||||
<question>
|
||||
<para><emphasis>The DB2 Control Center starts normally, but the "Systems" folder is empty.</emphasis></para>
|
||||
|
|
@ -2087,6 +2236,9 @@ because no local DB2 Administration Server can be available.
|
|||
</answer>
|
||||
</qandaentry>
|
||||
|
||||
|
||||
<indexterm><primary>Control Center</primary><secondary>troubleshooting</secondary></indexterm>
|
||||
|
||||
<qandaentry>
|
||||
<question>
|
||||
<para><emphasis>When I try to start the DB2 Control Center with
|
||||
|
|
@ -2116,6 +2268,10 @@ For a quick guide to installing the IBM Developer Kit for Java, see
|
|||
</answer>
|
||||
</qandaentry>
|
||||
|
||||
|
||||
<indexterm><primary>commands</primary><secondary>troubleshooting</secondary></indexterm>
|
||||
<indexterm><primary>db2 commands</primary><secondary>troubleshooting</secondary></indexterm>
|
||||
|
||||
<qandaentry>
|
||||
<question>
|
||||
<para><emphasis>
|
||||
|
|
@ -2140,6 +2296,10 @@ login. For instructions on how to remove or modify this output, see
|
|||
<sect1 id="jdkinstall">
|
||||
<title>Installing the IBM Developer Kit for Java</title>
|
||||
|
||||
<indexterm><primary>Java</primary><secondary>installing</secondary></indexterm>
|
||||
<indexterm><primary>JDK</primary><secondary>installing</secondary></indexterm>
|
||||
<indexterm><primary>JRE</primary><secondary>installing</secondary></indexterm>
|
||||
|
||||
<para>
|
||||
This section gives you quick and dirty instructions on how to install the
|
||||
IBM Developer Kit for Java, version <literal>1.1.8</literal>. You need this version to run
|
||||
|
|
@ -2303,7 +2463,12 @@ includes online discussion forums and links to other DB2 resources.
|
|||
</variablelist>
|
||||
</para>
|
||||
</appendix>
|
||||
|
||||
<appendix id="gpl">
|
||||
|
||||
<indexterm><primary>GPL</primary></indexterm>
|
||||
<indexterm><primary>GNU General Public License</primary></indexterm>
|
||||
|
||||
<title>GNU General Public License</title>
|
||||
<blockquote>
|
||||
<para>
|
||||
|
|
|
|||
Loading…
Reference in New Issue