6ca0464af5
We want to start tracking the memory consumption of mutation fragments. For this we need schema and permit during construction, and on each modification, so the memory consumption can be recalculated and pass to the permit. In this patch we just add the new parameters and go through the insane churn of updating all call sites. They will be used in the next patch.
139 lines
4.6 KiB
C++
139 lines
4.6 KiB
C++
/*
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* Copyright (C) 2018 ScyllaDB
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*/
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/*
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* This file is part of Scylla.
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*
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* Scylla is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero 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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*
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* Scylla 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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*
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* You should have received a copy of the GNU General Public License
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* along with Scylla. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include "dht/i_partitioner.hh"
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#include "schema_fwd.hh"
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#include "mutation_fragment.hh"
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#include "sstables/shared_sstable.hh"
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#include "database.hh"
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#include "reader_permit.hh"
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class evictable_reader_handle;
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namespace db::view {
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/*
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* A consumer that pushes materialized view updates for each consumed mutation.
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* It is expected to be run in seastar::async threaded context through consume_in_thread()
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*/
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class view_updating_consumer {
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public:
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// We prefer flushing on partition boundaries, so at the end of a partition,
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// we flush on reaching the soft limit. Otherwise we continue accumulating
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// data. We flush mid-partition if we reach the hard limit.
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static const size_t buffer_size_soft_limit;
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static const size_t buffer_size_hard_limit;
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private:
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schema_ptr _schema;
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reader_permit _permit;
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const seastar::abort_source* _as;
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evictable_reader_handle& _staging_reader_handle;
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circular_buffer<mutation> _buffer;
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mutation* _m{nullptr};
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size_t _buffer_size{0};
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noncopyable_function<future<row_locker::lock_holder>(mutation)> _view_update_pusher;
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private:
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void do_flush_buffer();
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void maybe_flush_buffer_mid_partition();
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public:
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// Push updates with a custom pusher. Mainly for tests.
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view_updating_consumer(schema_ptr schema, reader_permit permit, const seastar::abort_source& as, evictable_reader_handle& staging_reader_handle,
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noncopyable_function<future<row_locker::lock_holder>(mutation)> view_update_pusher)
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: _schema(std::move(schema))
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, _permit(std::move(permit))
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, _as(&as)
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, _staging_reader_handle(staging_reader_handle)
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, _view_update_pusher(std::move(view_update_pusher))
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{ }
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view_updating_consumer(schema_ptr schema, reader_permit permit, table& table, std::vector<sstables::shared_sstable> excluded_sstables, const seastar::abort_source& as,
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evictable_reader_handle& staging_reader_handle);
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view_updating_consumer(view_updating_consumer&&) = default;
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view_updating_consumer& operator=(view_updating_consumer&&) = delete;
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void consume_new_partition(const dht::decorated_key& dk) {
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_buffer.emplace_back(_schema, dk, mutation_partition(_schema));
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_m = &_buffer.back();
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}
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void consume(tombstone t) {
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_m->partition().apply(std::move(t));
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}
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stop_iteration consume(static_row&& sr) {
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if (_as->abort_requested()) {
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return stop_iteration::yes;
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}
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_buffer_size += sr.memory_usage(*_schema);
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_m->partition().apply(*_schema, mutation_fragment(*_schema, _permit, std::move(sr)));
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maybe_flush_buffer_mid_partition();
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return stop_iteration::no;
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}
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stop_iteration consume(clustering_row&& cr) {
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if (_as->abort_requested()) {
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return stop_iteration::yes;
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}
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_buffer_size += cr.memory_usage(*_schema);
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_m->partition().apply(*_schema, mutation_fragment(*_schema, _permit, std::move(cr)));
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maybe_flush_buffer_mid_partition();
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return stop_iteration::no;
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}
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stop_iteration consume(range_tombstone&& rt) {
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if (_as->abort_requested()) {
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return stop_iteration::yes;
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}
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_buffer_size += rt.memory_usage(*_schema);
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_m->partition().apply(*_schema, mutation_fragment(*_schema, _permit, std::move(rt)));
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maybe_flush_buffer_mid_partition();
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return stop_iteration::no;
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}
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// Expected to be run in seastar::async threaded context (consume_in_thread())
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stop_iteration consume_end_of_partition() {
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if (_as->abort_requested()) {
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return stop_iteration::yes;
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}
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if (_buffer_size >= buffer_size_soft_limit) {
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do_flush_buffer();
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}
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return stop_iteration::no;
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}
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stop_iteration consume_end_of_stream() {
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if (!_buffer.empty()) {
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do_flush_buffer();
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}
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return stop_iteration(_as->abort_requested());
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}
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};
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}
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