#964: Change compaction and remote bootstrap rate defaults.

Summary:
Increase both these from 100MB to 256MB/sec
--rocksdb_compact_flush_rate_limit_bytes_per_sec
--remote_boostrap_rate_limit_bytes_per_sec

Test Plan: Jenkins

Reviewers: hector, mikhail, kannan

Reviewed By: kannan

Subscribers: ybase

Differential Revision: https://phabricator.dev.yugabyte.com/D6312

src/yb/docdb/docdb_rocksdb_util.cc

@@ -50,7 +50,7 @@ DEFINE_int32(rocksdb_universal_compaction_size_ratio, 20,
              "The percentage upto which files that are larger are include in a compaction.");
 DEFINE_int32(rocksdb_universal_compaction_min_merge_width, 4,
              "The minimum number of files in a single compaction run.");
-DEFINE_int64(rocksdb_compact_flush_rate_limit_bytes_per_sec, 100 * 1024 * 1024,
+DEFINE_int64(rocksdb_compact_flush_rate_limit_bytes_per_sec, 256_MB,
              "Use to control write rate of flush and compaction.");
 DEFINE_uint64(rocksdb_compaction_size_threshold_bytes, 2ULL * 1024 * 1024 * 1024,
              "Threshold beyond which compaction is considered large.");

src/yb/tserver/remote_bootstrap_client.cc

@@ -103,7 +103,7 @@ DEFINE_test_flag(int32, simulate_long_remote_bootstrap_sec, 0,
                  "We use this for testing a scenario where a remote bootstrap takes longer than "
                  "follower_unavailable_considered_failed_sec seconds");
 
-DEFINE_int64(remote_boostrap_rate_limit_bytes_per_sec, 100_MB,
+DEFINE_int64(remote_boostrap_rate_limit_bytes_per_sec, 256_MB,
              "Maximum transmission rate during a remote bootstrap. This is across all the remote "
              "bootstrap sessions for which this process is acting as a sender or receiver. So "
              "the total limit will be 2 * remote_boostrap_rate_limit_bytes_per_sec because a "