From 995fb7420268c2457c9a64f41394cea54316365f Mon Sep 17 00:00:00 2001
From: Heikki Linnakangas
Date: Mon, 30 Jun 2008 10:58:47 +0000
Subject: Turn PGBE_ACTIVITY_SIZE into a GUC variable,
 track_activity_query_size.

As the buffer could now be a lot larger than before, and copying it could
thus be a lot more expensive than before, use strcpy instead of memcpy to
copy the query string, as was already suggested in comments. Also, only copy
the PgBackendStatus struct and string if the slot is in use.

Patch by Thomas Lee, with some changes by me.
---
 doc/src/sgml/config.sgml | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

(limited to 'doc/src')

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index f25ed24986c..97cf9452617 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -1,4 +1,4 @@
-<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.180 2008/06/14 21:59:59 alvherre Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.181 2008/06/30 10:58:47 heikki Exp $ -->
 
 <chapter Id="runtime-config">
   <title>Server Configuration</title>
@@ -3331,6 +3331,22 @@ COPY postgres_log FROM '/full/path/to/logfile.csv' WITH csv;
       </listitem>
      </varlistentry>
 
+     <varlistentry id="guc-track-activity-query-size" xreflabel="track_activity_query_size">
+      <term><varname>track_activity_query_size</varname> (<type>integer</type>)</term>
+      <indexterm>
+       <primary><varname>track_activity_query_size</> configuration parameter</primary>
+      </indexterm>
+      <listitem>
+       <para>
+       Specifies the number of bytes reserved to track the currently
+       executing command for each active session, for the
+       <structname>pg_stat_activity</>.<structfield>current_query</> field.
+       The default value is 1024. This parameter can only be set at server
+       start.
+       </para>
+      </listitem>
+     </varlistentry>
+
      <varlistentry id="guc-track-counts" xreflabel="track_counts">
       <term><varname>track_counts</varname> (<type>boolean</type>)</term>
       <indexterm>
-- 
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