110 lines
2.9 KiB
Rust
110 lines
2.9 KiB
Rust
// Copyright 2015, 2016 Ethcore (UK) Ltd.
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// This file is part of Parity.
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// Parity is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Parity is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Parity. If not, see <http://www.gnu.org/licenses/>.
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use std::cmp::max;
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const MIN_BC_CACHE_MB: u32 = 4;
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const MIN_DB_CACHE_MB: u32 = 2;
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const MIN_BLOCK_QUEUE_SIZE_LIMIT_MB: u32 = 16;
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const DEFAULT_BLOCK_QUEUE_SIZE_LIMIT_MB: u32 = 50;
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/// Configuration for application cache sizes.
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/// All values are represented in MB.
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#[derive(Debug, PartialEq)]
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pub struct CacheConfig {
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/// Size of database cache set using option `set_block_cache_size_mb`
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/// 50% is blockchain
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/// 25% is tracing
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/// 25% is state
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db: u32,
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/// Size of blockchain cache.
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blockchain: u32,
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/// Size of transaction queue cache.
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queue: u32,
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}
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impl Default for CacheConfig {
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fn default() -> Self {
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CacheConfig::new(64, 8, DEFAULT_BLOCK_QUEUE_SIZE_LIMIT_MB)
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}
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}
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impl CacheConfig {
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/// Creates new cache config with cumulative size equal `total`.
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pub fn new_with_total_cache_size(total: u32) -> Self {
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CacheConfig {
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db: total * 7 / 8,
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blockchain: total / 8,
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queue: DEFAULT_BLOCK_QUEUE_SIZE_LIMIT_MB,
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}
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}
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/// Creates new cache config with gitven details.
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pub fn new(db: u32, blockchain: u32, queue: u32) -> Self {
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CacheConfig {
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db: db,
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blockchain: blockchain,
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queue: queue,
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}
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}
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/// Size of db cache for blockchain.
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pub fn db_blockchain_cache_size(&self) -> u32 {
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max(MIN_DB_CACHE_MB, self.blockchain / 4)
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}
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/// Size of db cache for state.
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pub fn db_state_cache_size(&self) -> u32 {
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max(MIN_DB_CACHE_MB, self.db * 3 / 4)
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}
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/// Size of block queue size limit
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pub fn queue(&self) -> u32 {
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max(self.queue, MIN_BLOCK_QUEUE_SIZE_LIMIT_MB)
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}
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/// Size of the blockchain cache.
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pub fn blockchain(&self) -> u32 {
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max(self.blockchain, MIN_BC_CACHE_MB)
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}
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}
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#[cfg(test)]
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mod tests {
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use super::CacheConfig;
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#[test]
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fn test_cache_config_constructor() {
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let config = CacheConfig::new_with_total_cache_size(200);
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assert_eq!(config.db, 175);
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assert_eq!(config.blockchain(), 25);
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assert_eq!(config.queue(), 50);
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}
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#[test]
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fn test_cache_config_db_cache_sizes() {
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let config = CacheConfig::new_with_total_cache_size(400);
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assert_eq!(config.db, 350);
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assert_eq!(config.db_blockchain_cache_size(), 12);
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assert_eq!(config.db_state_cache_size(), 262);
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}
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#[test]
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fn test_cache_config_default() {
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assert_eq!(CacheConfig::default(), CacheConfig::new(64, 8, super::DEFAULT_BLOCK_QUEUE_SIZE_LIMIT_MB));
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}
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}
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