database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-07-28 23:42:10 +03:00
Code Activity

Allow default transaction isolation level (a.k.a. set session

Browse Source 
characteristics) to be set through GUC.
This commit is contained in:
Peter Eisentraut
2001-06-30 22:03:26 +00:00
parent e4a40cc353
commit 10e9cd2299
6 changed files with 79 additions and 87 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
doc/src/sgml/ref/set_transaction.sgml
View File

@ -1,4 +1,4 @@
<!-- $Header: /cvsroot/pgsql/doc/src/sgml/ref/set_transaction.sgml,v 1.3 2000/11/24 20:16:38 petere Exp $ -->
<!-- $Header: /cvsroot/pgsql/doc/src/sgml/ref/set_transaction.sgml,v 1.4 2001/06/30 22:03:25 petere Exp $ -->
<refentry id="SQL-SET-TRANSACTION">
<docinfo>
<date>2000-11-24</date>
@ -74,6 +74,18 @@ SET SESSION CHARACTERISTICS AS TRANSACTION ISOLATION LEVEL { READ COMMITTED | SE
</para>
</refsect1>
<refsect1>
<title>Notes</title>
<para>
The session default transaction isolation level can also be set
with the command <literal>SET default_transaction_isolation =
'<replaceable>value</replaceable>'</literal> and in the
configuration file. Consult the <citetitle>Administrator's
Guide</citetitle> for more information.
</para>
</refsect1>
<refsect1 id="R1-SQL-SET-TRANSACTION-3">
<title>Compatibility</title>

31
doc/src/sgml/runtime.sgml
View File

@ -1,5 +1,5 @@
<!--
$Header: /cvsroot/pgsql/doc/src/sgml/runtime.sgml,v 1.71 2001/06/30 21:15:57 darcy Exp $
$Header: /cvsroot/pgsql/doc/src/sgml/runtime.sgml,v 1.72 2001/06/30 22:03:25 petere Exp $
-->
<Chapter Id="runtime">
@ -996,6 +996,29 @@ env PGOPTIONS='-c geqo=off' psql
</listitem>
</varlistentry>
<varlistentry>
<indexterm>
<primary>transaction isolation level</primary>
</indexterm>
<term>DEFAUL_TRANSACTION_ISOLATION (<type>string</type>)</term>
<listitem>
<para>
Each SQL transaction has an isolation level, which can be
either <quote>read committed</quote> or
<quote>serializable</quote>. This parameter controls what the
isolation level of each new transaction is set to. The
default is read committed.
</para>
<para>
Consult the <citetitle>PostgreSQL User's Guide</citetitle> and
the command <command>SET TRANSACTION</command> for more
information.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>DYNAMIC_LIBRARY_PATH (<type>string</type>)</term>
<listitem>
@ -1051,9 +1074,9 @@ dynamic_library_path = '/usr/local/lib:/home/my_project/lib:$libdir:$libdir/cont
will use the <function>fsync()</> system call in several
places to make sure that updates are physically written to
disk and do not hang around in the kernel buffer cache. This
increases the chance that a database installation will still
be usable after an operating system or hardware crash by a
large amount. (Crashes of the database server itself do
increases the chance by a large amount that a database
installation will still be usable after an operating system or
hardware crash. (Crashes of the database server itself do
<emphasis>not</> affect this consideration.)
</para>