set memory limit back to where it used to be. Make demand import conf…

…igurable with an environment variable.

Turn on WSGILazyInitialization as the docs recommend that due to memory issues

deployment/base/hg-deployment.yaml

@@ -52,9 +52,9 @@ spec:
         # https://kubernetes.io/docs/concepts/configuration/manage-resources-containers
         resources:
           requests:
-            memory: 260Mi
+            memory: 400Mi
           limits:
-            memory: 260Mi
+            memory: 400Mi
         env:
           - name: CUSTOM_PORT
             value: "8088"
@@ -65,6 +65,8 @@ spec:
               configMapKeyRef:
                 name: app-config
                 key: hg-otel-enabled
+          - name: ENABLE_DEMAND_IMPORT
+            value: "false"
         ports:
           - containerPort: 8088
 

hgweb/hg.conf

@@ -1,6 +1,6 @@
 LoadModule wsgi_module /usr/lib/apache2/modules/mod_wsgi.so
 WSGIPythonOptimize 0
-WSGILazyInitialization Off
+WSGILazyInitialization On
 WSGISocketPrefix logs/wsgi
 LogLevel debug
 ServerName localhost

hgweb/hgweb.wsgi

@@ -1,3 +1,5 @@
+import os
+import sys
 # An example WSGI for use with mod_wsgi, edit as necessary
 # See https://mercurial-scm.org/wiki/modwsgi for more information
 # mod_wsgi docs: https://modwsgi.readthedocs.io/en/master/
@@ -13,7 +15,13 @@ config = b"/var/hg/hgweb.hgrc"
 #import cgitb; cgitb.enable()
 
 # enable demandloading to reduce startup time
-from mercurial import demandimport; demandimport.enable()
+from mercurial import demandimport;
+
+# enable demandloading to reduce startup time
+if os.getenv('ENABLE_DEMAND_IMPORT', 'false').lower() in ['1', 'true', 'yes']:
+    demandimport.enable()
+else:
+    demandimport.disable()
 
 from mercurial.hgweb import hgweb
 application = hgweb(config)