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use rocksdb caches for a few of the lru_caches

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Signed-off-by: Jason Volk <jason@zemos.net>
This commit is contained in:
Jason Volk 2024-04-08 01:29:52 -07:00 • committed by June
parent fc44ba6ab3
commit 345be5ba5e
10 changed files with 133 additions and 192 deletions
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83
src/database/rocksdb/mod.rs
View file

@ -1,9 +1,12 @@
use std::sync::{atomic::AtomicU32, Arc};
use std::{
collections::HashMap,
sync::{atomic::AtomicU32, Arc},
};
use chrono::{DateTime, Utc};
use rust_rocksdb::{
backup::{BackupEngine, BackupEngineOptions},
DBWithThreadMode as Db, MultiThreaded,
Cache, ColumnFamilyDescriptor, DBCommon, DBWithThreadMode as Db, Env, MultiThreaded, Options,
};
use tracing::{debug, error, info, warn};
@ -20,11 +23,11 @@ use super::watchers;
pub(crate) struct Engine {
rocks: Db<MultiThreaded>,
row_cache: rust_rocksdb::Cache,
col_cache: rust_rocksdb::Cache,
row_cache: Cache,
col_cache: HashMap<String, Cache>,
old_cfs: Vec<String>,
opts: rust_rocksdb::Options,
env: rust_rocksdb::Env,
opts: Options,
env: Env,
config: Config,
corks: AtomicU32,
}
@ -32,14 +35,17 @@ pub(crate) struct Engine {
impl KeyValueDatabaseEngine for Arc<Engine> {
fn open(config: &Config) -> Result<Self> {
let cache_capacity_bytes = config.db_cache_capacity_mb * 1024.0 * 1024.0;
let row_cache_capacity_bytes = (cache_capacity_bytes * 0.25) as usize;
let col_cache_capacity_bytes = (cache_capacity_bytes * 0.75) as usize;
let row_cache_capacity_bytes = (cache_capacity_bytes * 0.50) as usize;
let col_cache_capacity_bytes = (cache_capacity_bytes * 0.50) as usize;
let db_env = rust_rocksdb::Env::new()?;
let row_cache = rust_rocksdb::Cache::new_lru_cache(row_cache_capacity_bytes);
let col_cache = rust_rocksdb::Cache::new_lru_cache(col_cache_capacity_bytes);
let db_opts = db_options(config, &db_env, &row_cache, &col_cache);
let mut col_cache = HashMap::new();
col_cache.insert("primary".to_owned(), Cache::new_lru_cache(col_cache_capacity_bytes));
let db_env = Env::new()?;
let row_cache = Cache::new_lru_cache(row_cache_capacity_bytes);
let db_opts = db_options(config, &db_env, &row_cache, col_cache.get("primary").expect("cache"));
let load_time = std::time::Instant::now();
if config.rocksdb_repair {
warn!("Starting database repair. This may take a long time...");
if let Err(e) = Db::<MultiThreaded>::repair(&db_opts, &config.database_path) {
@ -53,7 +59,7 @@ impl KeyValueDatabaseEngine for Arc<Engine> {
debug!("Opening {} column family descriptors in database", cfs.len());
let cfds = cfs
.iter()
.map(|name| rust_rocksdb::ColumnFamilyDescriptor::new(name, cf_options(name, db_opts.clone(), config)))
.map(|name| ColumnFamilyDescriptor::new(name, cf_options(config, name, db_opts.clone(), &mut col_cache)))
.collect::<Vec<_>>();
debug!("Opening database...");
@ -63,7 +69,11 @@ impl KeyValueDatabaseEngine for Arc<Engine> {
Db::<MultiThreaded>::open_cf_descriptors(&db_opts, &config.database_path, cfds)?
};
info!("Opened database at sequence number {}", db.latest_sequence_number());
info!(
"Opened database at sequence number {} in {:?}",
db.latest_sequence_number(),
load_time.elapsed()
);
Ok(Arc::new(Engine {
rocks: db,
row_cache,
@ -91,13 +101,13 @@ impl KeyValueDatabaseEngine for Arc<Engine> {
}
fn flush(&self) -> Result<()> {
rust_rocksdb::DBCommon::flush_wal(&self.rocks, false)?;
DBCommon::flush_wal(&self.rocks, false)?;
Ok(())
}
fn sync(&self) -> Result<()> {
rust_rocksdb::DBCommon::flush_wal(&self.rocks, true)?;
DBCommon::flush_wal(&self.rocks, true)?;
Ok(())
}
@ -119,31 +129,34 @@ impl KeyValueDatabaseEngine for Arc<Engine> {
}
fn memory_usage(&self) -> Result<String> {
let stats = rust_rocksdb::perf::get_memory_usage_stats(
Some(&[&self.rocks]),
Some(&[&self.row_cache, &self.col_cache]),
)?;
Ok(format!(
"Approximate memory usage of all the mem-tables: {:.3} MB\nApproximate memory usage of un-flushed \
mem-tables: {:.3} MB\nApproximate memory usage of all the table readers: {:.3} MB\nApproximate memory \
usage by cache: {:.3} MB\nApproximate memory usage by row cache: {:.3} MB pinned: {:.3} MB\nApproximate \
memory usage by column cache: {:.3} MB pinned: {:.3} MB\n",
stats.mem_table_total as f64 / 1024.0 / 1024.0,
stats.mem_table_unflushed as f64 / 1024.0 / 1024.0,
stats.mem_table_readers_total as f64 / 1024.0 / 1024.0,
stats.cache_total as f64 / 1024.0 / 1024.0,
self.row_cache.get_usage() as f64 / 1024.0 / 1024.0,
self.row_cache.get_pinned_usage() as f64 / 1024.0 / 1024.0,
self.col_cache.get_usage() as f64 / 1024.0 / 1024.0,
self.col_cache.get_pinned_usage() as f64 / 1024.0 / 1024.0,
))
let mut res = String::new();
let stats = rust_rocksdb::perf::get_memory_usage_stats(Some(&[&self.rocks]), Some(&[&self.row_cache]))?;
_ = std::fmt::write(
&mut res,
format_args!(
"Memory buffers: {:.2} MiB\nPending write: {:.2} MiB\nTable readers: {:.2} MiB\nRow cache: {:.2} MiB\n",
stats.mem_table_total as f64 / 1024.0 / 1024.0,
stats.mem_table_unflushed as f64 / 1024.0 / 1024.0,
stats.mem_table_readers_total as f64 / 1024.0 / 1024.0,
self.row_cache.get_usage() as f64 / 1024.0 / 1024.0,
),
);
for (name, cache) in &self.col_cache {
_ = std::fmt::write(
&mut res,
format_args!("{} cache: {:.2} MiB\n", name, cache.get_usage() as f64 / 1024.0 / 1024.0,),
);
}
Ok(res)
}
fn cleanup(&self) -> Result<()> {
debug!("Running flush_opt");
let flushoptions = rust_rocksdb::FlushOptions::default();
rust_rocksdb::DBCommon::flush_opt(&self.rocks, &flushoptions)?;
DBCommon::flush_opt(&self.rocks, &flushoptions)?;
Ok(())
}