Change default epochs-per-state-diff to 16

This should make replaying diffs during non-finality a bit quicker.

Author: michaelsproul

beacon_node/src/cli.rs

@@ -752,7 +752,7 @@ pub fn cli_app<'a, 'b>() -> App<'a, 'b> {
                 .help("Number of epochs between state diffs stored in the database. Lower values \
                        result in more writes and more data stored, while higher values result in \
                        more block replaying and longer load times in case of cache miss.")
-                .default_value("4")
+                .default_value("16")
                 .takes_value(true)
         )
         /*

beacon_node/store/src/config.rs

@@ -6,7 +6,7 @@ use ssz_derive::{Decode, Encode};
 use std::io::Write;
 use zstd::Encoder;
 
-pub const DEFAULT_EPOCHS_PER_STATE_DIFF: u64 = 4;
+pub const DEFAULT_EPOCHS_PER_STATE_DIFF: u64 = 16;
 pub const DEFAULT_BLOCK_CACHE_SIZE: usize = 64;
 pub const DEFAULT_STATE_CACHE_SIZE: usize = 128;
 pub const DEFAULT_COMPRESSION_LEVEL: i32 = 1;