From 1a02f182bb6af0a2034fd7e1c1c938fab61e413f Mon Sep 17 00:00:00 2001
From: Sarah Hoffmann <lonvia@denofr.de>
Date: Wed, 27 Mar 2013 23:29:48 +0100
Subject: [PATCH] use db load for blocks

---
 utils/cron_banip.py | 25 ++++++++++++-------------
 1 file changed, 12 insertions(+), 13 deletions(-)

diff --git a/utils/cron_banip.py b/utils/cron_banip.py
index 54b7ae8c..55a7b295 100755
--- a/utils/cron_banip.py
+++ b/utils/cron_banip.py
@@ -62,8 +62,8 @@ BULKLONG_LIMIT=8000
 BULKSHORT_LIMIT=2000
 BLOCK_UPPER=19000
 BLOCK_LOWER=4000
-BLOCK_LOADFAC=300
-BULK_LOADFAC=100
+BLOCK_LOADFAC=380
+BULK_LOADFAC=160
 BULK_LOWER=1500
 
 #
@@ -75,11 +75,6 @@ try:
 except IOError:
     pass
 
-# determine current load
-fd = open("/proc/loadavg")
-avgload = int(float(fd.readline().split()[2]))
-fd.close()
-
 # read the previous blocklist
 WHITELIST = set(WHITELIST.split()) if WHITELIST else set()
 prevblocks = []
@@ -101,14 +96,18 @@ try:
 except IOError:
     pass #ignore non-existing file
 
-# current number of bulks
-numbulks = len(prevbulks)
-
-BLOCK_LIMIT = max(BLOCK_LOWER, BLOCK_UPPER - BLOCK_LOADFAC * (numbulks - 27))
-BULKLONG_LIMIT = max(BULK_LOWER, BULKLONG_LIMIT - BULK_LOADFAC * (avgload - 14))
-
+# determine current load
+fd = open("/proc/loadavg")
+avgload = int(float(fd.readline().split()[2]))
+fd.close()
+# DB load
 conn = psycopg2.connect('dbname=nominatim')
 cur = conn.cursor()
+cur.execute("select count(*)/60 from new_query_log where starttime > now() - interval '1min'")
+dbload = int(cur.fetchone()[0])
+
+BLOCK_LIMIT = max(BLOCK_LOWER, BLOCK_UPPER - BLOCK_LOADFAC * (dbload - 70))
+BULKLONG_LIMIT = max(BULK_LOWER, BULKLONG_LIMIT - BULK_LOADFAC * (avgload - 14))
 
 # get the new block candidates
 cur.execute("""
-- 
2.39.5