log improvements (#1564)

src/indexer/segment_writer.rs

@@ -374,9 +374,9 @@ fn remap_and_write(
         doc_id_map,
     )?;
 
-    debug!("resort-docstore");
     // finalize temp docstore and create version, which reflects the doc_id_map
     if let Some(doc_id_map) = doc_id_map {
+        debug!("resort-docstore");
         let store_write = serializer
             .segment_mut()
             .open_write(SegmentComponent::Store)?;

src/store/compressors.rs

@@ -104,6 +104,13 @@ impl ZstdCompressor {
                             value, opt_name, err
                         )
                     })?;
+                    if value >= 15 {
+                        warn!(
+                            "High zstd compression level detected: {:?}. High compression levels \
+                             (>=15) are slow and will limit indexing speed.",
+                            value
+                        )
+                    }
                     compressor.compression_level = Some(value);
                 }
                 _ => {