diff --git a/lang/en/moodle.php b/lang/en/moodle.php
index 5fe9a09cdcb..9e42a4336b9 100644
--- a/lang/en/moodle.php
+++ b/lang/en/moodle.php
@@ -1588,6 +1588,9 @@ $string['privacy:metadata:task_adhoc'] = 'The status of adhoc tasks.';
 $string['privacy:metadata:task_adhoc:component'] = 'The component owning the task.';
 $string['privacy:metadata:task_adhoc:nextruntime'] = 'The earliest time to run this task.';
 $string['privacy:metadata:task_adhoc:userid'] = 'The user to run the task as.';
+$string['privacy:metadata:task_log'] = 'Log output for a log';
+$string['privacy:metadata:task_log:component'] = 'The component owning the task.';
+$string['privacy:metadata:task_log:userid'] = 'The user that the task belonged to.';
 $string['privacy:metadata:upgrade_log'] = 'The upgrade log.';
 $string['privacy:metadata:upgrade_log:backtrace'] = 'Any backtrace associated with this upgrade step.';
 $string['privacy:metadata:upgrade_log:details'] = 'Extra information relating to the upgrade.';
diff --git a/lib/classes/privacy/provider.php b/lib/classes/privacy/provider.php
index b9d1d670a81..bc9b8f8cf78 100644
--- a/lib/classes/privacy/provider.php
+++ b/lib/classes/privacy/provider.php
@@ -88,6 +88,13 @@ class provider implements
                 'userid'        => 'privacy:metadata:task_adhoc:userid',
             ], 'privacy:metadata:task_adhoc');
 
+        // The task_log table stores debugging data for tasks.
+        // These are cleaned regularly and intended purely for debugging.
+        $collection->add_database_table('task_log', [
+                'component'     => 'privacy:metadata:task_log:component',
+                'userid'        => 'privacy:metadata:task_log:userid',
+            ], 'privacy:metadata:task_log');
+
         // The events_queue includes information about pending events tasks.
         // These are stored for short periods whilst being processed into other locations.
         $collection->add_database_table('events_queue', [
diff --git a/lib/db/install.xml b/lib/db/install.xml
index a456c84e711..2c57cdaa3da 100644
--- a/lib/db/install.xml
+++ b/lib/db/install.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8" ?>
-<XMLDB PATH="lib/db" VERSION="20181105" COMMENT="XMLDB file for core Moodle tables"
+<XMLDB PATH="lib/db" VERSION="20181205" COMMENT="XMLDB file for core Moodle tables"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:noNamespaceSchemaLocation="../../lib/xmldb/xmldb.xsd"
 >
@@ -3305,6 +3305,27 @@
         <INDEX NAME="nextruntime_idx" UNIQUE="false" FIELDS="nextruntime"/>
       </INDEXES>
     </TABLE>
+    <TABLE NAME="task_log" COMMENT="The log table for all tasks">
+      <FIELDS>
+        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" SEQUENCE="true"/>
+        <FIELD NAME="type" TYPE="int" LENGTH="4" NOTNULL="true" SEQUENCE="false" COMMENT="The type of task. Scheduled task = 0; Adhoc task = 1."/>
+        <FIELD NAME="component" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" COMMENT="The component that the task belongs to"/>
+        <FIELD NAME="classname" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" COMMENT="The class of the task being run"/>
+        <FIELD NAME="userid" TYPE="int" LENGTH="10" NOTNULL="true" SEQUENCE="false" COMMENT="The userid that the task was configured to run as (Adhoc tasks only)"/>
+        <FIELD NAME="timestart" TYPE="number" LENGTH="20" NOTNULL="true" SEQUENCE="false" DECIMALS="10" COMMENT="The start time of the task"/>
+        <FIELD NAME="timeend" TYPE="number" LENGTH="20" NOTNULL="true" SEQUENCE="false" DECIMALS="10" COMMENT="The end time of the task"/>
+        <FIELD NAME="dbreads" TYPE="int" LENGTH="10" NOTNULL="true" SEQUENCE="false" COMMENT="The number of DB reads performed during the task."/>
+        <FIELD NAME="dbwrites" TYPE="int" LENGTH="10" NOTNULL="true" SEQUENCE="false" COMMENT="The number of DB writes performed during the task."/>
+        <FIELD NAME="result" TYPE="int" LENGTH="2" NOTNULL="true" SEQUENCE="false" COMMENT="Whether the task was successful or not. 0 = pass; 1 = fail."/>
+      </FIELDS>
+      <KEYS>
+        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
+      </KEYS>
+      <INDEXES>
+        <INDEX NAME="classname" UNIQUE="false" FIELDS="classname"/>
+        <INDEX NAME="timestart" UNIQUE="false" FIELDS="timestart"/>
+      </INDEXES>
+    </TABLE>
     <TABLE NAME="messageinbound_handlers" COMMENT="Inbound Message Handler definitions.">
       <FIELDS>
         <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" SEQUENCE="true"/>
diff --git a/lib/db/upgrade.php b/lib/db/upgrade.php
index 5e7324d29a9..80dc8ec4c38 100644
--- a/lib/db/upgrade.php
+++ b/lib/db/upgrade.php
@@ -2516,5 +2516,37 @@ function xmldb_main_upgrade($oldversion) {
         upgrade_main_savepoint(true, 2018120301.02);
     }
 
+    if ($oldversion < 2019011500.00) {
+        // Define table task_log to be created.
+        $table = new xmldb_table('task_log');
+
+        // Adding fields to table task_log.
+        $table->add_field('id', XMLDB_TYPE_INTEGER, '10', null, XMLDB_NOTNULL, XMLDB_SEQUENCE, null);
+        $table->add_field('type', XMLDB_TYPE_INTEGER, '4', null, XMLDB_NOTNULL, null, null);
+        $table->add_field('component', XMLDB_TYPE_CHAR, '255', null, XMLDB_NOTNULL, null, null);
+        $table->add_field('classname', XMLDB_TYPE_CHAR, '255', null, XMLDB_NOTNULL, null, null);
+        $table->add_field('userid', XMLDB_TYPE_INTEGER, '10', null, XMLDB_NOTNULL, null, null);
+        $table->add_field('timestart', XMLDB_TYPE_NUMBER, '20, 10', null, XMLDB_NOTNULL, null, null);
+        $table->add_field('timeend', XMLDB_TYPE_NUMBER, '20, 10', null, XMLDB_NOTNULL, null, null);
+        $table->add_field('dbreads', XMLDB_TYPE_INTEGER, '10', null, XMLDB_NOTNULL, null, null);
+        $table->add_field('dbwrites', XMLDB_TYPE_INTEGER, '10', null, XMLDB_NOTNULL, null, null);
+        $table->add_field('result', XMLDB_TYPE_INTEGER, '2', null, XMLDB_NOTNULL, null, null);
+
+        // Adding keys to table task_log.
+        $table->add_key('primary', XMLDB_KEY_PRIMARY, ['id']);
+
+        // Adding indexes to table task_log.
+        $table->add_index('classname', XMLDB_INDEX_NOTUNIQUE, ['classname']);
+        $table->add_index('timestart', XMLDB_INDEX_NOTUNIQUE, ['timestart']);
+
+        // Conditionally launch create table for task_log.
+        if (!$dbman->table_exists($table)) {
+            $dbman->create_table($table);
+        }
+
+        // Main savepoint reached.
+        upgrade_main_savepoint(true, 2019011500.00);
+    }
+
     return true;
 }
diff --git a/version.php b/version.php
index d0e192f9a23..be82e4bb506 100644
--- a/version.php
+++ b/version.php
@@ -29,7 +29,7 @@
 
 defined('MOODLE_INTERNAL') || die();
 
-$version  = 2019011100.00;              // YYYYMMDD      = weekly release date of this DEV branch.
+$version  = 2019011500.00;              // YYYYMMDD      = weekly release date of this DEV branch.
                                         //         RR    = release increments - 00 in DEV branches.
                                         //           .XX = incremental changes.