def __init__(self, database: DatabasePool, db_conn, hs):
super().__init__(database, db_conn, hs)
# Originally the state store used a single DictionaryCache to cache the
# event IDs for the state types in a given state group to avoid hammering
# on the state_group* tables.
#
# The point of using a DictionaryCache is that it can cache a subset
# of the state events for a given state group (i.e. a subset of the keys for a
# given dict which is an entry in the cache for a given state group ID).
#
# However, this poses problems when performing complicated queries
# on the store - for instance: "give me all the state for this group, but
# limit members to this subset of users", as DictionaryCache's API isn't
# rich enough to say "please cache any of these fields, apart from this subset".
# This is problematic when lazy loading members, which requires this behaviour,
# as without it the cache has no choice but to speculatively load all
# state events for the group, which negates the efficiency being sought.
#
# Rather than overcomplicating DictionaryCache's API, we instead split the
# state_group_cache into two halves - one for tracking non-member events,
# and the other for tracking member_events. This means that lazy loading
# queries can be made in a cache-friendly manner by querying both caches
# separately and then merging the result. So for the example above, you
# would query the members cache for a specific subset of state keys
# (which DictionaryCache will handle efficiently and fine) and the non-members
# cache for all state (which DictionaryCache will similarly handle fine)
# and then just merge the results together.
#
# We size the non-members cache to be smaller than the members cache as the
# vast majority of state in Matrix (today) is member events.
self._state_group_cache = DictionaryCache(
"*stateGroupCache*",
# TODO: this hasn't been tuned yet
50000,
)
self._state_group_members_cache = DictionaryCache(
"*stateGroupMembersCache*",
500000,
)
def get_max_state_group_txn(txn: Cursor):
txn.execute("SELECT COALESCE(max(id), 0) FROM state_groups")
return txn.fetchone()[0]
self._state_group_seq_gen = build_sequence_generator(
db_conn,
self.database_engine,
get_max_state_group_txn,
"state_group_id_seq",
table="state_groups",
id_column="id",
)
def __init__(self, hs):
self.hs = hs
self._db_pool = hs.get_db_pool()
self._clock = hs.get_clock()
self._previous_txn_total_time = 0
self._current_txn_total_time = 0
self._previous_loop_ts = 0
# TODO(paul): These can eventually be removed once the metrics code
# is running in mainline, and we have some nice monitoring frontends
# to watch it
self._txn_perf_counters = PerformanceCounters()
self._get_event_counters = PerformanceCounters()
self._get_event_cache = Cache("*getEvent*", keylen=3, lru=True,
max_entries=hs.config.event_cache_size)
self._state_group_cache = DictionaryCache(
"*stateGroupCache*", 2000 * CACHE_SIZE_FACTOR
)
self._event_fetch_lock = threading.Condition()
self._event_fetch_list = []
self._event_fetch_ongoing = 0
self._pending_ds = []
self.database_engine = hs.database_engine
def __init__(self, hs):
self.hs = hs
self._db_pool = hs.get_db_pool()
self._clock = hs.get_clock()
self._previous_txn_total_time = 0
self._current_txn_total_time = 0
self._previous_loop_ts = 0
# TODO(paul): These can eventually be removed once the metrics code
# is running in mainline, and we have some nice monitoring frontends
# to watch it
self._txn_perf_counters = PerformanceCounters()
self._get_event_counters = PerformanceCounters()
self._get_event_cache = Cache("*getEvent*",
keylen=3,
lru=True,
max_entries=hs.config.event_cache_size)
self._state_group_cache = DictionaryCache("*stateGroupCache*", 2000)
self._event_fetch_lock = threading.Condition()
self._event_fetch_list = []
self._event_fetch_ongoing = 0
self._pending_ds = []
self.database_engine = hs.database_engine
self._stream_id_gen = StreamIdGenerator("events", "stream_ordering")
self._transaction_id_gen = IdGenerator("sent_transactions", "id", self)
self._state_groups_id_gen = IdGenerator("state_groups", "id", self)
self._access_tokens_id_gen = IdGenerator("access_tokens", "id", self)
self._pushers_id_gen = IdGenerator("pushers", "id", self)
self._push_rule_id_gen = IdGenerator("push_rules", "id", self)
self._push_rules_enable_id_gen = IdGenerator("push_rules_enable", "id",
self)
self._receipts_id_gen = StreamIdGenerator("receipts_linearized",
"stream_id")
def __init__(self, db_conn, hs):
super(StateGroupWorkerStore, self).__init__(db_conn, hs)
self._state_group_cache = DictionaryCache(
"*stateGroupCache*",
500000 * get_cache_factor_for("stateGroupCache"))
def setUp(self):
self.cache = DictionaryCache("foobar")
def __init__(self, db_conn, hs):
super(StateGroupWorkerStore, self).__init__(db_conn, hs)
self._state_group_cache = DictionaryCache("*stateGroupCache*",
100000 * CACHE_SIZE_FACTOR)
