diff --git a/checkin_notes b/checkin_notes
index 93961fcfb9..6b1b61dddf 100755
--- a/checkin_notes
+++ b/checkin_notes
@@ -22195,4 +22195,20 @@ Janus   7 Jan 2005
         edit_forum_preferences_action.php
       /html/inc
         forum_show.inc
-        forum.inc
\ No newline at end of file
+        forum.inc
+
+David  7 Jan 2005
+    - drop the indices on mod_time.
+        (result: app_mod_time, workunit: wu_filedel)
+        For SETI@home they were too much of a performance hit.
+        They're needed only for db_purge and result_summary.php,
+        which will have to do a sequential scan instead
+    - db_dump: try several times to remove old stats directory
+
+    db/
+        constraints.sql
+    html/ops/
+        db_update.php
+    sched/
+        db_dump.C
+        sched_locality.C
diff --git a/db/constraints.sql b/db/constraints.sql
index a223c263d4..a5cbea50d1 100644
--- a/db/constraints.sql
+++ b/db/constraints.sql
@@ -32,7 +32,7 @@ alter table workunit
         -- validator
     add index wu_timeout (transition_time),
         -- transitioner
-    add index wu_filedel (file_delete_state, mod_time),
+    add index wu_filedel (file_delete_state),
         -- file_deleter, db_purge
     add index wu_assim (appid, assimilate_state);
         -- assimilator
@@ -66,9 +66,6 @@ alter table result
     add index res_wu_user (workunitid, userid),
         -- scheduler (avoid sending mult results of same WU to one user)
 
-    add index app_mod_time (appid, mod_time desc);
-        -- html_ops/result_summary.php
-
 alter table msg_from_host
     add index message_handled (handled);
         -- for message handler
diff --git a/html/ops/db_update.php b/html/ops/db_update.php
index 69eccb4b5d..0e6d41b285 100644
--- a/html/ops/db_update.php
+++ b/html/ops/db_update.php
@@ -204,6 +204,12 @@ function update_12_27_2004() {
     mysql_query("alter table workunit add index wu_filedel (file_delete_state, mod_time)");
 }
 
+function update_1_3_2005() {
+    mysql_query("alter table workunit drop index wu_filedel");
+    mysql_query("alter table workunit add index wu_filedel (file_delete_state)");
+    mysql_query("alter table result drop index app_mod_time");
+}
+
 //update_10_25_2004();
 
 ?>
diff --git a/sched/db_dump.C b/sched/db_dump.C
index a935587156..40e75a4d20 100644
--- a/sched/db_dump.C
+++ b/sched/db_dump.C
@@ -778,9 +778,17 @@ int main(int argc, char** argv) {
 
     sprintf(buf, "cp %s %s/db_dump.xml", spec_filename, spec.output_dir);
     system(buf);
-    sprintf(buf, "/bin/rm -rf %s; mv %s %s",
-        spec.final_output_dir, spec.output_dir, spec.final_output_dir
-    );
+    sprintf(buf, "/bin/rm -rf %s", spec.final_output_dir);
+    for (int i=0; i<10; i++) {
+        retval = system(buf);
+        if (!retval) break;
+        sleep(1);
+    }
+    if (retval) {
+        log_messages.printf(SCHED_MSG_LOG::CRITICAL, "Can't remove old stats\n");
+        exit(1);
+    }
+    sprintf(buf, "mv %s %s", spec.output_dir, spec.final_output_dir);
     system(buf);
     log_messages.printf(SCHED_MSG_LOG::NORMAL, "db_dump finished\n");
 }
diff --git a/sched/sched_locality.C b/sched/sched_locality.C
index 5792e8a5dd..5594ece99f 100644
--- a/sched/sched_locality.C
+++ b/sched/sched_locality.C
@@ -37,6 +37,8 @@
 #include "sched_msgs.h"
 #include "sched_locality.h"
 
+// get filename from result name
+//
 static int extract_filename(char* in, char* out) {
     strcpy(out, in);
     char* p = strstr(out, "__");
@@ -184,8 +186,8 @@ static void send_new_file_work(
         retval = extract_filename(result.name, filename);
         if (retval) {
             log_messages.printf(
-                SCHED_MSG_LOG::CRITICAL,
-                "bad filename: %s\n", result.name
+                SCHED_MSG_LOG::DEBUG
+                "result doesn't contain filename: %s\n", result.name
             );
             continue;
         }