* Interpreter transaction ID decoupled from storage transaction ID
* Transactional scope for indices, statistics and constraints
* Storage::Accessor now has 2 modes (unique and shared)
* Introduced ResourceLock to fix pthread mutex problems
* Split InfoQuery in two: non-transactional SystemInfoQuery and transactional DatabaseInfoQuery
* Replicable and durable statistics
* Bumped WAL/Snapshot versions
* Initial implementation of the Lamport clock
---------
Co-authored-by: Andreja Tonev <andreja.tonev@memgraph.io>
This commit introduces memory tracker with jemalloc extent hooks which fully works in case when jemalloc config is following:
MALLOC_CONF="retain:false,percpu_arena:percpu,oversize_threshold:1000000000000,muzzy_decay_ms:0,dirty_decay_ms:0" \
./configure \
--disable-cxx \
$COMMON_CONFIGURE_FLAGS \
--with-malloc-conf="retain:false,percpu_arena:percpu,oversize_threshold:1000000000000,muzzy_decay_ms:0,dirty_decay_ms:0"
This config will for jemalloc not to use lazy purge or MADV_FREE(muzzy_decay_ms=0 and dirty_decay_ms=0), it will force jemalloc not to use
custom arena for huge allocations (oversize_threshold) and it will force jemalloc not extend virtual memory indefinitely (retain=false)
and therefore call alloc hook when allocation actually takes place.
Only problem is if we do huge allocations which are not mapped on alloc directly, in that case jemalloc uses cache and we can overcounter
allocation size.
Before a distinct on one aggregate would impact distinct on another
aggregate. Fixed the logical error and at the same time did some memory
optimisations.
Unique/global InterpreterContext that is Storage agnostic (has a reference to the DbmsHandler instead)
* InterpreterContext is no longer the owner of Storage
* New Database structure that handles Storage, Triggers, Streams
* Renamed SessinContextHandler to DbmsHandler and simplified the multi-tenant logic
* Added Gatekeeper and updated handlers to use it
---------
Co-authored-by: Gareth Lloyd <gareth.lloyd@memgraph.io>
