Re: Lucene GeoNear Search and Sort Performance

[sc]

David,

I was able to get it working with minor changes in my codebase. I didn't
have back port PointVectorStrategy class from 6.6.0 to 5.5.4

Code:
        final int maxNumberOfCachedQueries = 256;
        final long maxRamBytesUsed = 50 * 1024L * 1024L; // 50MB

        final QueryCache queryCache = new 
LRUQueryCache(maxNumberOfCachedQueries,
maxRamBytesUsed);
        final QueryCachingPolicy defaultCachingPolicy = new
UsageTrackingQueryCachingPolicy();

        this.strategy = new PointVectorStrategy(ctx, "pointvector");

Indexing:
                doc.add(new DoubleDocValuesField("pointvector__x", longitude));
                doc.add(new DoubleDocValuesField("pointvector__y", latitude));

                Point pt = ctx.makePoint(longitude, latitude);
                for (IndexableField f : strategy.createIndexableFields(pt)) {
                        doc.add(f);
                }

                doc.add(new StoredField(strategy.getFieldName(), pt.getX() + " 
" +
pt.getY()));

Searching :

                Point p = ctx.makePoint(lng, lat);
                Circle c = ctx.makeCircle(lng, lat, deg);
                SpatialArgs args = new SpatialArgs(SpatialOperation.Intersects, 
c);
                Query query = strategy.makeQuery(args);

                ValueSource valueSource = strategy.makeDistanceValueSource(p);
                Sort distSort = new
Sort(valueSource.getSortField(false)).rewrite(searcher);

                int limit = 10;
                TopDocs topDocs = searcher.search(query, limit, distSort);


While, I was able to get almost similar performance when compared with later
versions of Lucene 6.6.0, but the memory consumption is more with Lucene
5.5.4 almost 5x.

I am testing with 30K Lat/Lon and memory increases overtime.

Any suggestions to improve memory consumption or code?

Thanks





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