diff -r 133f5a54ed9d -r 774c00348f9f mercurial/revlog.py
--- a/mercurial/revlog.py	Tue Oct 10 10:02:21 2023 +0200
+++ b/mercurial/revlog.py	Tue Oct 10 10:02:29 2023 +0200
@@ -628,8 +628,6 @@
         else:
             new_header = REVLOG_DEFAULT_VERSION
 
-        if b'chunkcachesize' in opts:
-            self.data_config.chunk_cache_size = opts[b'chunkcachesize']
         if b'maxchainlen' in opts:
             self.delta_config.max_chain_len = opts[b'maxchainlen']
         if b'deltabothparents' in opts: