9e3ace42a4
Summary: The patch adds statistics support to the new BlobDB garbage collection implementation; namely, it adds support for the following (pre-existing) tickers: `BLOB_DB_GC_NUM_FILES`: the number of blob files obsoleted by the GC logic. `BLOB_DB_GC_NUM_NEW_FILES`: the number of new blob files generated by the GC logic. `BLOB_DB_GC_FAILURES`: the number of failed GC passes (where a GC pass is equivalent to a (sub)compaction). `BLOB_DB_GC_NUM_KEYS_RELOCATED`: the number of blobs relocated to new blob files by the GC logic. `BLOB_DB_GC_BYTES_RELOCATED`: the total size of blobs relocated to new blob files. The tickers `BLOB_DB_GC_NUM_KEYS_OVERWRITTEN`, `BLOB_DB_GC_NUM_KEYS_EXPIRED`, `BLOB_DB_GC_BYTES_OVERWRITTEN`, `BLOB_DB_GC_BYTES_EXPIRED`, and `BLOB_DB_GC_MICROS` are not relevant for the new GC logic, and are thus marked deprecated. The patch also adds a couple of log messages that log the number and total size of blobs encountered and relocated during a GC pass, as well as the number of blob files created and obsoleted. Pull Request resolved: https://github.com/facebook/rocksdb/pull/6296 Test Plan: Extended unit tests and used the BlobDB mode of `db_bench`. Differential Revision: D19402513 Pulled By: ltamasi fbshipit-source-id: d53d2bfbf4928a1db1e9346c67ebb9007b8932ec
53 lines
1.3 KiB
C++
53 lines
1.3 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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//
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#pragma once
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#ifndef ROCKSDB_LITE
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namespace rocksdb {
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namespace blob_db {
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/**
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* Statistics related to a single garbage collection pass (i.e. a single
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* (sub)compaction).
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*/
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class BlobDBGarbageCollectionStats {
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public:
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uint64_t AllBlobs() const { return all_blobs_; }
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uint64_t AllBytes() const { return all_bytes_; }
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uint64_t RelocatedBlobs() const { return relocated_blobs_; }
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uint64_t RelocatedBytes() const { return relocated_bytes_; }
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uint64_t NewFiles() const { return new_files_; }
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bool HasError() const { return error_; }
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void AddBlob(uint64_t size) {
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++all_blobs_;
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all_bytes_ += size;
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}
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void AddRelocatedBlob(uint64_t size) {
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++relocated_blobs_;
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relocated_bytes_ += size;
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}
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void AddNewFile() { ++new_files_; }
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void SetError() { error_ = true; }
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private:
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uint64_t all_blobs_ = 0;
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uint64_t all_bytes_ = 0;
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uint64_t relocated_blobs_ = 0;
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uint64_t relocated_bytes_ = 0;
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uint64_t new_files_ = 0;
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bool error_ = false;
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};
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} // namespace blob_db
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} // namespace rocksdb
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#endif // ROCKSDB_LITE
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