joerghoh commented on code in PR #111:
URL: 
https://github.com/apache/sling-org-apache-sling-resourceresolver/pull/111#discussion_r1443021563


##########
src/main/java/org/apache/sling/resourceresolver/impl/mapping/MapEntries.java:
##########
@@ -1148,19 +1148,26 @@ private boolean addEntry(final Map<String, 
List<MapEntry>> entryMap, final Strin
      */
     private Map<String, Map<String, Collection<String>>> loadAliases(final 
ResourceResolver resolver) {
         final Map<String, Map<String, Collection<String>>> map = new 
ConcurrentHashMap<>();
-        final String queryString = generateAliasQuery();
+        final String baseQueryString = generateAliasQuery();
 
-        log.debug("start alias query: {}", queryString);
-        long queryStart = System.nanoTime();
-        final Iterator<Resource> i = resolver.findResources(queryString, 
"JCR-SQL2");
-        long queryElapsed = System.nanoTime() - queryStart;
-        log.debug("end alias query; elapsed {}ms", 
TimeUnit.NANOSECONDS.toMillis(queryElapsed));
+        Iterator<Resource> it;
+        try {
+            final String queryStringWithSort = baseQueryString + " AND 
FIRST([sling:alias]) > '%s' ORDER BY FIRST([sling:alias])";
+            it = new PagedQueryIterator("alias", "sling:alias", resolver, 
queryStringWithSort,
+                    Integer.getInteger("sling.alias.pageSize", 2000));

Review Comment:
   @reschke IIUC this is an implementation detail, which is not impacting the 
functionality in any way. It could influence performance under some 
circumstances though.
   
   I don't think that it makes sense to expose this setting via OSGI 
configuration, as it would indicate that there might be reasons to change it. 
Not sure if even the chance to override it via system properties is necessary.
   
   Can we postpone this decision until we have gathered some experience with 
it? Until then we should treat the way to change the value via system 
properties as implementation detail, which can change at any time.



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