Increase default trie cache size to 1GiB (#6546)

The default trie cache size before was set to `64MiB`, which is quite
low to achieve real speed ups. `1GiB` should be a reasonable number as
the requirements for validators/collators/full nodes are much higher
when it comes to minimum memory requirements. Also the cache will not
use `1GiB` from the start and fills over time. The setting can be
changed by setting `--trie-cache-size BYTE_SIZE`.

---------

Co-authored-by: GitHub Action <action@github.com>

prdoc/pr_6546.prdoc

+title: Increase default trie cache size to 1GiB
+doc:
+- audience: Node Operator
+  description: "The default trie cache size before was set to `64MiB`, which is quite\
+    \ low to achieve real speed ups. `1GiB` should be a reasonable number as the requirements\
+    \ for validators/collators/full nodes are much higher when it comes to minimum\
+    \ memory requirements. Also the cache will not use `1GiB` from the start and fills\
+    \ over time. The setting can be changed by setting `--trie-cache-size BYTE_SIZE`.\
+    The CLI option `--state-cache-size` is also removed, which was not having any effect anymore.\r\
+    \n"
+crates:
+- name: sc-cli
+  bump: patch

substrate/client/cli/src/params/import_params.rs

@@ -78,21 +78,13 @@ pub struct ImportParams {
 	/// Specify the state cache size.
 	///
 	/// Providing `0` will disable the cache.
-	#[arg(long, value_name = "Bytes", default_value_t = 67108864)]
+	#[arg(long, value_name = "Bytes", default_value_t = 1024 * 1024 * 1024)]
 	pub trie_cache_size: usize,
-
-	/// DEPRECATED: switch to `--trie-cache-size`.
-	#[arg(long)]
-	state_cache_size: Option<usize>,
 }
 
 impl ImportParams {
 	/// Specify the trie cache maximum size.
 	pub fn trie_cache_maximum_size(&self) -> Option<usize> {
-		if self.state_cache_size.is_some() {
-			eprintln!("`--state-cache-size` was deprecated. Please switch to `--trie-cache-size`.");
-		}
-
 		if self.trie_cache_size == 0 {
 			None
 		} else {