ffdd47c2b1
Added support to track and limit the memory usage by sstable components. A reclaimable component of an SSTable is one from which memory can be reclaimed. SSTables and their managers now track such reclaimable memory and limit the component memory usage accordingly. A new configuration variable defines the memory reclaim threshold. If the total memory of the reclaimable components exceeds this limit, memory will be reclaimed to keep the usage under the limit. This PR considers only the bloom filters as reclaimable and adds support to track and limit them as required. The feature can be manually verified by doing the following : 1. run a single-node single-shard 1GB cluster 2. create a table with bloom-filter-false-positive-chance of 0.001 (to intentionally cause large bloom filter) 3. populate with tiny partitions 4. watch the bloom filter metrics get capped at 100MB The default value of the `components_memory_reclaim_threshold` config variable which controls the reclamation process is `.1`. This can also be reduced further during manual tests to easily hit the threshold and verify the feature. Fixes #17747 Closes scylladb/scylladb#17771 * github.com:scylladb/scylladb: test_bloom_filter.py: disable reclaiming memory from components sstable_datafile_test: add tests to verify auto reclamation of components test/lib: allow overriding available memory via test_env_config sstables_manager: support reclaiming memory from components sstables_manager: store available memory size sstables_manager: add variable to track component memory usage db/config: add a new variable to limit memory used by table components sstable_datafile_test: add testcase to verify reclamation from sstables sstables: support reclaiming memory from components
Scylla in-source tests.
For details on how to run the tests, see docs/dev/testing.md
Shared C++ utils, libraries are in lib/, for Python - pylib/
alternator - Python tests which connect to a single server and use the DynamoDB API unit, boost, raft - unit tests in C++ cql-pytest - Python tests which connect to a single server and use CQL topology* - tests that set up clusters and add/remove nodes cql - approval tests that use CQL and pre-recorded output rest_api - tests for Scylla REST API Port 9000 scylla-gdb - tests for scylla-gdb.py helper script nodetool - tests for C++ implementation of nodetool
If you can use an existing folder, consider adding your test to it. New folders should be used for new large categories/subsystems, or when the test environment is significantly different from some existing suite, e.g. you plan to start scylladb with different configuration, and you intend to add many tests and would like them to reuse an existing Scylla cluster (clusters can be reused for tests within the same folder).
To add a new folder, create a new directory, and then
copy & edit its suite.ini.