diff --git a/admin/classes/task_log_table.php b/admin/classes/task_log_table.php
index 2bb892db2a4..949e757422e 100644
--- a/admin/classes/task_log_table.php
+++ b/admin/classes/task_log_table.php
@@ -131,7 +131,8 @@ class task_log_table extends \table_sql {
         }
 
         $sql = "SELECT
-                    tl.*,
+                    tl.id, tl.type, tl.component, tl.classname, tl.userid, tl.timestart, tl.timeend,
+                    tl.dbreads, tl.dbwrites, tl.result,
                     tl.dbreads + tl.dbwrites AS db,
                     tl.timeend - tl.timestart AS duration,
                     {$userfields}
diff --git a/admin/tasklogs.php b/admin/tasklogs.php
index 7820f60b2f4..0fb52069512 100644
--- a/admin/tasklogs.php
+++ b/admin/tasklogs.php
@@ -46,6 +46,8 @@ $logid = optional_param('logid', null, PARAM_INT);
 $download = optional_param('download', false, PARAM_BOOL);
 
 if (null !== $logid) {
+    // Raise memory limit in case the log is large.
+    raise_memory_limit(MEMORY_HUGE);
     $log = $DB->get_record('task_log', ['id' => $logid], '*', MUST_EXIST);
 
     if ($download) {