rgw: increase default metadata cache size for accounts

account users will put some extra pressure on the metadata cache,
because each request has to load metadata for the account and zero
or more groups, in addition to the user's access key and user metadata

Signed-off-by: Casey Bodley <[email protected]>

Author: cbodley

src/common/options/rgw.yaml.in

@@ -290,7 +290,7 @@ options:
   desc: Max number of items in RGW metadata cache.
   long_desc: When full, the RGW metadata cache evicts least recently used entries.
   fmt_desc: The number of entries in the Ceph Object Gateway cache.
-  default: 10000
+  default: 25000
   services:
   - rgw
   see_also: