diff --git a/code/features-index/index-forward/build.gradle b/code/features-index/index-forward/build.gradle
index 6c09f048..8ceb710e 100644
--- a/code/features-index/index-forward/build.gradle
+++ b/code/features-index/index-forward/build.gradle
@@ -19,8 +19,6 @@ dependencies {
     implementation project(':code:common:model')
     implementation project(':code:common:process')
 
-    implementation project(':third-party:uppend')
-
     implementation libs.bundles.slf4j
 
     implementation libs.prometheus
diff --git a/code/features-index/index-forward/src/main/java/nu/marginalia/index/forward/ForwardIndexReader.java b/code/features-index/index-forward/src/main/java/nu/marginalia/index/forward/ForwardIndexReader.java
index 01f83292..04e4fce1 100644
--- a/code/features-index/index-forward/src/main/java/nu/marginalia/index/forward/ForwardIndexReader.java
+++ b/code/features-index/index-forward/src/main/java/nu/marginalia/index/forward/ForwardIndexReader.java
@@ -1,6 +1,5 @@
 package nu.marginalia.index.forward;
 
-import com.upserve.uppend.blobs.NativeIO;
 import gnu.trove.map.hash.TLongIntHashMap;
 import nu.marginalia.array.LongArray;
 import nu.marginalia.array.LongArrayFactory;
@@ -65,12 +64,7 @@ public class ForwardIndexReader {
     }
 
     private static LongArray loadData(Path dataFile) throws IOException {
-        var data = LongArrayFactory.mmapForReadingShared(dataFile);
-
-        // Total data is small, try to keep it in RAM for speed
-        data.advice(NativeIO.Advice.WillNeed);
-
-        return data;
+        return LongArrayFactory.mmapForReadingShared(dataFile);
     }
 
     public long getDocMeta(long docId) {
diff --git a/code/libraries/array/build.gradle b/code/libraries/array/build.gradle
index ecf84807..306ab2f9 100644
--- a/code/libraries/array/build.gradle
+++ b/code/libraries/array/build.gradle
@@ -10,8 +10,6 @@ java {
 }
 
 dependencies {
-    implementation project(':third-party:uppend')
-
     implementation libs.bundles.slf4j
 
     implementation libs.notnull
diff --git a/code/libraries/array/src/main/java/nu/marginalia/array/IntArray.java b/code/libraries/array/src/main/java/nu/marginalia/array/IntArray.java
index 58985825..7f16bb63 100644
--- a/code/libraries/array/src/main/java/nu/marginalia/array/IntArray.java
+++ b/code/libraries/array/src/main/java/nu/marginalia/array/IntArray.java
@@ -1,6 +1,5 @@
 package nu.marginalia.array;
 
-import com.upserve.uppend.blobs.NativeIO;
 import nu.marginalia.array.algo.IntArrayBase;
 import nu.marginalia.array.algo.IntArraySearch;
 import nu.marginalia.array.algo.IntArraySort;
@@ -30,9 +29,5 @@ public interface IntArray extends IntArrayBase, IntArrayTransformations, IntArra
 
     void force();
 
-
-    void advice(NativeIO.Advice advice) throws IOException;
-    void advice(NativeIO.Advice advice, long start, long end) throws IOException;
-
     default void close() { }
 }
diff --git a/code/libraries/array/src/main/java/nu/marginalia/array/LongArray.java b/code/libraries/array/src/main/java/nu/marginalia/array/LongArray.java
index 518e289d..cb334b07 100644
--- a/code/libraries/array/src/main/java/nu/marginalia/array/LongArray.java
+++ b/code/libraries/array/src/main/java/nu/marginalia/array/LongArray.java
@@ -1,6 +1,5 @@
 package nu.marginalia.array;
 
-import com.upserve.uppend.blobs.NativeIO;
 import nu.marginalia.array.algo.LongArrayBase;
 import nu.marginalia.array.algo.LongArraySearch;
 import nu.marginalia.array.algo.LongArraySort;
@@ -8,7 +7,6 @@ import nu.marginalia.array.algo.LongArrayTransformations;
 import nu.marginalia.array.delegate.ShiftedLongArray;
 import nu.marginalia.array.page.SegmentLongArray;
 
-import java.io.IOException;
 import java.lang.foreign.Arena;
 
 
@@ -32,7 +30,4 @@ public interface LongArray extends LongArrayBase, LongArrayTransformations, Long
 
     void force();
     void close();
-
-    void advice(NativeIO.Advice advice) throws IOException;
-    void advice(NativeIO.Advice advice, long start, long end) throws IOException;
 }
diff --git a/code/libraries/array/src/main/java/nu/marginalia/array/delegate/ReferenceImplIntArrayDelegate.java b/code/libraries/array/src/main/java/nu/marginalia/array/delegate/ReferenceImplIntArrayDelegate.java
index 866286e4..8431cba7 100644
--- a/code/libraries/array/src/main/java/nu/marginalia/array/delegate/ReferenceImplIntArrayDelegate.java
+++ b/code/libraries/array/src/main/java/nu/marginalia/array/delegate/ReferenceImplIntArrayDelegate.java
@@ -1,6 +1,5 @@
 package nu.marginalia.array.delegate;
 
-import com.upserve.uppend.blobs.NativeIO;
 import nu.marginalia.array.ArrayRangeReference;
 import nu.marginalia.array.IntArray;
 
@@ -51,14 +50,4 @@ public class ReferenceImplIntArrayDelegate implements IntArray {
         delegate.force();
     }
 
-
-    @Override
-    public void advice(NativeIO.Advice advice) throws IOException {
-        delegate.advice(advice);
-    }
-
-    @Override
-    public void advice(NativeIO.Advice advice, long start, long end) throws IOException {
-        delegate.advice(advice, start, end);
-    }
 }
diff --git a/code/libraries/array/src/main/java/nu/marginalia/array/delegate/ReferenceImplLongArrayDelegate.java b/code/libraries/array/src/main/java/nu/marginalia/array/delegate/ReferenceImplLongArrayDelegate.java
index 4d145479..cb8030bd 100644
--- a/code/libraries/array/src/main/java/nu/marginalia/array/delegate/ReferenceImplLongArrayDelegate.java
+++ b/code/libraries/array/src/main/java/nu/marginalia/array/delegate/ReferenceImplLongArrayDelegate.java
@@ -1,6 +1,5 @@
 package nu.marginalia.array.delegate;
 
-import com.upserve.uppend.blobs.NativeIO;
 import nu.marginalia.array.ArrayRangeReference;
 import nu.marginalia.array.LongArray;
 
@@ -51,17 +50,6 @@ public class ReferenceImplLongArrayDelegate implements LongArray {
         delegate.force();
     }
 
-
-    @Override
-    public void advice(NativeIO.Advice advice) throws IOException {
-        delegate.advice(advice);
-    }
-
-    @Override
-    public void advice(NativeIO.Advice advice, long start, long end) throws IOException {
-        delegate.advice(advice, start, end);
-    }
-
     @Override
     public void close() {
         delegate.close();
diff --git a/code/libraries/array/src/main/java/nu/marginalia/array/delegate/ShiftedIntArray.java b/code/libraries/array/src/main/java/nu/marginalia/array/delegate/ShiftedIntArray.java
index a231322d..1339266d 100644
--- a/code/libraries/array/src/main/java/nu/marginalia/array/delegate/ShiftedIntArray.java
+++ b/code/libraries/array/src/main/java/nu/marginalia/array/delegate/ShiftedIntArray.java
@@ -1,6 +1,5 @@
 package nu.marginalia.array.delegate;
 
-import com.upserve.uppend.blobs.NativeIO;
 import nu.marginalia.array.ArrayRangeReference;
 import nu.marginalia.array.IntArray;
 import nu.marginalia.array.algo.SortingContext;
@@ -210,14 +209,4 @@ public class ShiftedIntArray implements IntArray {
         delegate.force();
     }
 
-    @Override
-    public void advice(NativeIO.Advice advice) throws IOException {
-        delegate.advice(advice, shift, shift + size());
-    }
-
-    @Override
-    public void advice(NativeIO.Advice advice, long start, long end) throws IOException {
-        delegate.advice(advice, start + shift, end + shift);
-    }
-
 }
diff --git a/code/libraries/array/src/main/java/nu/marginalia/array/delegate/ShiftedLongArray.java b/code/libraries/array/src/main/java/nu/marginalia/array/delegate/ShiftedLongArray.java
index 67799126..d0dd2958 100644
--- a/code/libraries/array/src/main/java/nu/marginalia/array/delegate/ShiftedLongArray.java
+++ b/code/libraries/array/src/main/java/nu/marginalia/array/delegate/ShiftedLongArray.java
@@ -1,6 +1,5 @@
 package nu.marginalia.array.delegate;
 
-import com.upserve.uppend.blobs.NativeIO;
 import nu.marginalia.array.ArrayRangeReference;
 import nu.marginalia.array.LongArray;
 import nu.marginalia.array.algo.LongArraySearch;
@@ -282,14 +281,4 @@ public class ShiftedLongArray implements LongArray {
         delegate.force();
     }
 
-    @Override
-    public void advice(NativeIO.Advice advice) throws IOException {
-        delegate.advice(advice, shift, shift + size());
-    }
-
-    @Override
-    public void advice(NativeIO.Advice advice, long start, long end) throws IOException {
-        delegate.advice(advice, start + shift, end + shift);
-    }
-
 }
diff --git a/code/libraries/array/src/main/java/nu/marginalia/array/page/SegmentIntArray.java b/code/libraries/array/src/main/java/nu/marginalia/array/page/SegmentIntArray.java
index 62e23056..3aba6900 100644
--- a/code/libraries/array/src/main/java/nu/marginalia/array/page/SegmentIntArray.java
+++ b/code/libraries/array/src/main/java/nu/marginalia/array/page/SegmentIntArray.java
@@ -1,9 +1,7 @@
 package nu.marginalia.array.page;
 
-import com.upserve.uppend.blobs.NativeIO;
 import nu.marginalia.array.ArrayRangeReference;
 import nu.marginalia.array.IntArray;
-import nu.marginalia.array.IntArray;
 
 import javax.annotation.Nullable;
 import java.io.IOException;
@@ -11,7 +9,6 @@ import java.lang.foreign.Arena;
 import java.lang.foreign.MemorySegment;
 import java.nio.ByteBuffer;
 import java.nio.IntBuffer;
-import java.nio.LongBuffer;
 import java.nio.channels.FileChannel;
 import java.nio.file.Files;
 import java.nio.file.OpenOption;
@@ -176,14 +173,4 @@ public class SegmentIntArray implements PartitionPage, IntArray {
 
     }
 
-    @Override
-    public void advice(NativeIO.Advice advice) throws IOException {
-//        NativeIO.madvise((MappedByteBuffer) byteBuffer, advice);
-    }
-
-    @Override
-    public void advice(NativeIO.Advice advice, long start, long end) throws IOException {
-//        NativeIO.madviseRange((MappedByteBuffer) byteBuffer, advice, (int) start, (int) (end-start));
-    }
-
 }
diff --git a/code/libraries/array/src/main/java/nu/marginalia/array/page/SegmentLongArray.java b/code/libraries/array/src/main/java/nu/marginalia/array/page/SegmentLongArray.java
index 628f902f..edaaefc3 100644
--- a/code/libraries/array/src/main/java/nu/marginalia/array/page/SegmentLongArray.java
+++ b/code/libraries/array/src/main/java/nu/marginalia/array/page/SegmentLongArray.java
@@ -1,6 +1,5 @@
 package nu.marginalia.array.page;
 
-import com.upserve.uppend.blobs.NativeIO;
 import nu.marginalia.array.ArrayRangeReference;
 import nu.marginalia.array.LongArray;
 
@@ -174,14 +173,4 @@ public class SegmentLongArray implements PartitionPage, LongArray {
 
     }
 
-    @Override
-    public void advice(NativeIO.Advice advice) throws IOException {
-//        NativeIO.madvise((MappedByteBuffer) byteBuffer, advice);
-    }
-
-    @Override
-    public void advice(NativeIO.Advice advice, long start, long end) throws IOException {
-//        NativeIO.madviseRange((MappedByteBuffer) byteBuffer, advice, (int) start, (int) (end-start));
-    }
-
 }
diff --git a/settings.gradle b/settings.gradle
index 68d593b6..d91df376 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -92,7 +92,6 @@ include 'third-party:porterstemmer'
 include 'third-party:xz'
 include 'third-party:symspell'
 include 'third-party:rdrpostagger'
-include 'third-party:uppend'
 include 'third-party:openzim'
 include 'third-party:count-min-sketch'
 include 'third-party:monkey-patch-opennlp'
diff --git a/third-party/README.md b/third-party/README.md
index 8949f377..9913e658 100644
--- a/third-party/README.md
+++ b/third-party/README.md
@@ -8,10 +8,10 @@ or lack an artifact, or to override some default that is inappropriate for the t
 ### Modified
 * [RDRPosTagger](rdrpostagger/) - GPL3
 * [PorterStemmer](porterstemmer/) - LGPL3
-* [Uppend](uppend/) - MIT
 * [OpenZIM](openzim/) - GPL-2.0+
 * [Commons Codec](commons-codec/) - Apache 2.0
 * [encylopedia.marginalia.nu](encyclopedia-marginalia-nu/) - GPL 2.0+
+
 ### Repackaged
 * [SymSpell](symspell/) - LGPL-3.0
 * [Count-Min-Sketch](count-min-sketch/) - Apache 2.0