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// Copyright 2021 Yiyuan Liu
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
mod util;
use rocksdb::{OptimisticTransactionDB, Options, SingleThreaded};
use util::DBPath;
#[test]
fn test_optimistic_transaction_db_memory_usage() {
let path = DBPath::new("_rust_rocksdb_optimistic_transaction_db memory_usage_test");
{
let mut options = Options::default();
options.create_if_missing(true);
options.enable_statistics();
// setup cache:
let cache = rocksdb::Cache::new_lru_cache(1 << 20); // 1 MB cache
let mut block_based_options = rocksdb::BlockBasedOptions::default();
block_based_options.set_block_cache(&cache);
options.set_block_based_table_factory(&block_based_options);
let db: OptimisticTransactionDB<SingleThreaded> =
OptimisticTransactionDB::open(&options, &path).unwrap();
let mut builder = rocksdb::perf::MemoryUsageBuilder::new().unwrap();
builder.add_db(&db);
builder.add_cache(&cache);
let memory_usage = builder.build().unwrap();
for i in 1..=1000 {
let key = format!("key{}", i);
let value = format!("value{}", i);
db.put(&key, &value).unwrap();
}
for i in 1..=1000 {
let key = format!("key{}", i);
let result = db.get(&key).unwrap().unwrap();
let result_str = String::from_utf8(result).unwrap();
assert_eq!(result_str, format!("value{}", i));
}
assert_ne!(memory_usage.approximate_mem_table_total(), 0);
assert_eq!(memory_usage.approximate_mem_table_readers_total(), 0); // Equals zero!
assert_ne!(memory_usage.approximate_cache_total(), 0);
assert_ne!(memory_usage.approximate_mem_table_unflushed(), 0);
}
}
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