There might be a performance impect of updating the metadata store on
bulk operations. Hence this flag which is disabling the collection by
default. If the queries to obtain the information are called with this
flag disabled, the database will throw an exception.
This PR introduces READ COMMITTED and READ UNCOMMITTED isolation levels.
The isolation level can be set with a config or with a query for different scopes.
Summary:
The configuration file that was used for the Debian/CentOS package was manually
written. This diff adds a configuration file generator that extracts all of the
necessary information about the flags directly from the built binary and uses
that information to generate the configuration file for the packages.
Reviewers: teon.banek
Reviewed By: teon.banek
Subscribers: pullbot
Differential Revision: https://phabricator.memgraph.io/D2589
Summary:
Don't use flag files for specifying flag values in tests. Instead, all
necessary flags are explicitly defined in each of the tests.
Reviewers: teon.banek
Reviewed By: teon.banek
Subscribers: pullbot
Differential Revision: https://phabricator.memgraph.io/D2588
Summary:
This diff introduces a new flags
* `--synchronous-commit`
The `--synchronous-commit` tells the WAL when should the deltas be flushed to
the disk drive. By default this is off and the WAL flushes deltas every `N`
milliseconds. If it's turned on, on every transaction end, commit or abort, the
WAL will first flush the deltas and only after that will return from ending a
transaction.
Reviewers: buda, vkasljevic, mferencevic, teon.banek, ipaljak
Reviewed By: mferencevic
Subscribers: pullbot
Differential Revision: https://phabricator.memgraph.io/D1542
Summary:
This diff implements OpenSSL support in the network stack.
Currently SSL support is only enabled for Bolt connections,
support for RPC connections will be added in another diff.
Reviewers: buda, teon.banek
Reviewed By: buda
Subscribers: pullbot
Differential Revision: https://phabricator.memgraph.io/D1328
Summary:
Add telemetry to main memgraph binary
Add resource usage collector
Add telemetry flag
Change telemetry collector logic
Fix utils compilation
Add timestamp
Add first version of interactive test
Started working on test runner
Implement all tests
Flake8 on runner.py
Integrate test with Apollo
Add TODO
Reviewers: buda, teon.banek
Reviewed By: buda, teon.banek
Subscribers: pullbot
Differential Revision: https://phabricator.memgraph.io/D1419
Summary:
My dear fellow Memgraphians. It's friday afternoon, and I am as ready to pop as WAL is to get reviewed...
What's done:
- Vertices and Edges have global IDs, stored in `VersionList`. Main storage is now a concurrent map ID->vlist_ptr.
- WriteAheadLog class added. It's based around buffering WAL::Op objects (elementraly DB changes) and periodically serializing and flusing them to disk.
- Snapshot recovery refactored, WAL recovery added. Snapshot format changed again to include necessary info.
- Durability testing completely reworked.
What's not done (and should be when we decide how):
- Old WAL file purging.
- Config refactor (naming and organization). Will do when we discuss what we want.
- Changelog and new feature documentation (both depending on the point above).
- Better error handling and recovery feedback. Currently it's all returning bools, which is not fine-grained enough (neither for errors nor partial successes, also EOF is reported as a failure at the moment).
- Moving the implementation of WAL stuff to .cpp where possible.
- Not sure if there are transactions being created outside of `GraphDbAccessor` and it's `BuildIndex`. Need to look into.
- True write-ahead logic (flag controlled): not committing a DB transaction if the WAL has not flushed it's data. We can discuss the gain/effort ratio for this feature.
Reviewers: buda, mislav.bradac, teon.banek, dgleich
Reviewed By: dgleich
Subscribers: mtomic, pullbot
Differential Revision: https://phabricator.memgraph.io/D958
Summary:
This should be the basis for default configuration that is to be shipped
in release builds/packages.
Reviewers: mislav.bradac, florijan, buda, mferencevic
Reviewed By: florijan
Subscribers: pullbot
Differential Revision: https://phabricator.memgraph.io/D851
Summary:
Increased query execution timeout.
Enabled global queries by default.
Implemented faster RandomElement for vertices and edges.
Changed long running verify message format.
Changed vertex and edge count to be per worker.
Reviewers: mislav.bradac
Reviewed By: mislav.bradac
Subscribers: pullbot
Differential Revision: https://phabricator.memgraph.io/D864
Summary:
AST caching should be well tested by now.
We should consider removing `Context.is_query_cached_` member as well as the
implementation and tests for `CypherMainVisitor`.
Reviewers: mislav.bradac, mferencevic, buda
Reviewed By: mislav.bradac
Subscribers: pullbot
Differential Revision: https://phabricator.memgraph.io/D833
Summary:
Run neo4j and memgraph from run_benchmark script.
This makes mg and neo scripts obsolete.
Reviewers: buda, teon.banek
Reviewed By: teon.banek
Subscribers: pullbot
Differential Revision: https://phabricator.memgraph.io/D806
Summary: Alpha package scripts. Alpha version is going to be shipped within docker.
Reviewers: teon.banek, mferencevic
Reviewed By: teon.banek
Subscribers: pullbot, buda
Differential Revision: https://phabricator.memgraph.io/D436
