commit 99f7567eaa6fad9b271f55d1469fcd383bb13205
from: Stefan Sperling <stsp@stsp.name>
date: Tue Nov 08 12:39:36 2022 UTC

reduce delta cache size to avoid running out of memory on large pack files

As reported by Jerome Kasper, got-index-pack would run out of memory while
cloning projects like LLVM or the Linux kernel. The delta cache was pushed
to its maximum size limit of ~2GB, which is much higher than the default
user data limit on OpenBSD. Set the delta cache size limits to values which
should result in the cache limiting itself to 128MB or less.

commit - 22f6beb0dae033aa1e023e1d849d5cede058e002
commit + 99f7567eaa6fad9b271f55d1469fcd383bb13205
blob - 7040864a05c512e8185f1db76e4230360addabfe
blob + 764a86ea44c7cb639fc39ffdaca2a0f3db638d9e
--- lib/delta_cache.c
+++ lib/delta_cache.c
@@ -40,9 +40,9 @@
 #endif
 
 #define GOT_DELTA_CACHE_MIN_BUCKETS	64
-#define GOT_DELTA_CACHE_MAX_BUCKETS	16384
+#define GOT_DELTA_CACHE_MAX_BUCKETS	2048
 #define GOT_DELTA_CACHE_MAX_CHAIN	2
-#define GOT_DELTA_CACHE_MAX_DELTA_SIZE	2048
+#define GOT_DELTA_CACHE_MAX_DELTA_SIZE	1024
 
 struct got_cached_delta {
 	off_t offset;