Merge pull request 'fix(llama-embed): size the batch for bge-m3 tokenizer, not Paperless' (#762) from embed-batch-fix into master

Reviewed-on: k.renner/homelab#762

kubernetes/apps/llama-server/embed.yaml

@@ -64,16 +64,27 @@ spec:
             - "99"
             - --threads
             - "2"
-            # Paperless chunks documents at 1024 tokens. The defaults are
-            # batch 2048 / ubatch 512, and with --embeddings llama-server
-            # clamps both down to 512 rather than run them mismatched — below
-            # the chunk size. Matching both to 1024 fits a whole chunk in one
-            # pass; 2048 is deliberately avoided, since that is where this
-            # Vulkan stack fails with ErrorDeviceLost.
+            # Paperless chunks at 1024 tokens, but counts them with its own
+            # tokenizer while this server measures the batch in bge-m3's.
+            # Those disagree: XLM-RoBERTa splits German into more pieces than
+            # llama_index's counter does, so a chunk Paperless considers full
+            # at 1024 arrived here as 1069 and the request failed outright —
+            # "input (1069 tokens) is too large to process".
+            #
+            # The headroom therefore has to absorb a tokenizer ratio, not just
+            # a rounding error, and 1.5x covers far more than the 1.044 that
+            # broke it. The defaults are batch 2048 / ubatch 512, and with
+            # --embeddings llama-server clamps both to the smaller rather than
+            # run them mismatched, so both are set.
+            #
+            # 2048 stays avoided: that is where the chat model met
+            # ErrorDeviceLost on this Vulkan stack. That failure came under a
+            # 20 GB model's memory pressure and may not bind a 600 MB one, but
+            # this does not need to find out.
             - --batch-size
-            - "1024"
+            - "1536"
             - --ubatch-size
-            - "1024"
+            - "1536"
             # Room for a full chunk plus overhead rather than exactly one.
             - --ctx-size
             - "4096"