diff --git a/VERSION b/VERSION
index c043eea..276cbf9 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.2.1
+2.3.0
diff --git a/core/utils/date_utils.py b/core/utils/date_utils.py
index 4f3df0e..49be589 100644
--- a/core/utils/date_utils.py
+++ b/core/utils/date_utils.py
@@ -105,7 +105,7 @@ def truncate_datetime_to_hour(dt):
     Returns:
     datetime: The truncated datetime object.
     """
-    dt = _coerce_datetime(dt)
+    dt = coerce_datetime(dt)
     if dt is None:
         return None
 
@@ -122,14 +122,14 @@ def extract_minute_second_key(dt):
     Returns:
     str: A string in the format "MM:SS" representing the minute and second.
     """
-    dt = _coerce_datetime(dt)
+    dt = coerce_datetime(dt)
     if dt is None:
         return None
 
     return f"{dt.minute:02}:{dt.second:02}"
 
 
-def _coerce_datetime(dt):
+def coerce_datetime(dt):
     if isinstance(dt, datetime):
         return dt
 
diff --git a/metrics/counter/access/accumulation.py b/metrics/counter/access/accumulation.py
index bed2407..6b009d5 100644
--- a/metrics/counter/access/accumulation.py
+++ b/metrics/counter/access/accumulation.py
@@ -1,7 +1,7 @@
 import re
 from urllib.parse import unquote, urlparse
 
-from core.utils.date_utils import extract_minute_second_key, truncate_datetime_to_hour
+from core.utils.date_utils import coerce_datetime
 
 
 def accumulate(results, counter_access, line):
@@ -12,14 +12,15 @@ def accumulate(results, counter_access, line):
 
     client_name = line.get("client_name")
     client_version = line.get("client_version")
-    local_datetime = line.get("local_datetime")
+    local_datetime = coerce_datetime(line.get("local_datetime"))
     ip_address = line.get("ip_address")
 
-    access_datetime = truncate_datetime_to_hour(local_datetime)
-    ms_key = extract_minute_second_key(local_datetime)
-    if access_datetime is None or ms_key is None:
+    if local_datetime is None:
         raise ValueError("Invalid local_datetime in parsed log line.")
 
+    access_datetime = local_datetime.replace(minute=0, second=0, microsecond=0)
+    second_of_hour = local_datetime.minute * 60 + local_datetime.second
+
     user_session_id = _generate_user_session_id(
         client_name,
         client_version,
@@ -30,7 +31,7 @@ def accumulate(results, counter_access, line):
         counter_access=counter_access,
         line=line,
         access_datetime=access_datetime,
-        minute_second_key=ms_key,
+        second_of_hour=second_of_hour,
         user_session_id=user_session_id,
     )
     item_access_id = raw_record["id"]
@@ -38,8 +39,6 @@ def accumulate(results, counter_access, line):
     if item_access_id not in results:
         results[item_access_id] = raw_record["data"]
 
-    _increment_timestamp_count(results[item_access_id]["click_timestamps"], ms_key)
-
     access_url_key = access_url or "|".join(
         [
             str(counter_access.get("pid_generic") or ""),
@@ -51,11 +50,15 @@ def accumulate(results, counter_access, line):
         "click_timestamps_by_url", {}
     )
     url_timestamps = timestamps_by_url.setdefault(access_url_key, {})
-    _increment_timestamp_count(url_timestamps, ms_key)
+    _increment_timestamp_count(url_timestamps, second_of_hour)
 
 
 def _build_record(
-    counter_access, line, access_datetime, minute_second_key, user_session_id
+    counter_access,
+    line,
+    access_datetime,
+    second_of_hour,
+    user_session_id,
 ):
     collection = counter_access.get("collection")
     source_key = _source_key(counter_access, collection)
@@ -91,9 +94,7 @@ def _build_record(
             "document": _document_metadata(counter_access),
             "title_pid_generic": counter_access.get("title_pid_generic") or pid_generic,
             "user_session_id": user_session_id,
-            "click_timestamps": {minute_second_key: 0},
             "click_timestamps_by_url": {},
-            "access_url": counter_access.get("access_url"),
             "media_format": media_format,
             "content_language": content_language,
             "content_type": content_type,
diff --git a/metrics/counter/access/daily_accumulator.py b/metrics/counter/access/daily_accumulator.py
new file mode 100644
index 0000000..7032ccb
--- /dev/null
+++ b/metrics/counter/access/daily_accumulator.py
@@ -0,0 +1,33 @@
+class DailyAccessAccumulator(dict):
+    def __init__(self):
+        super().__init__()
+        self._documents = {}
+        self._sources = {}
+        self._sessions = {}
+
+    def __setitem__(self, key, value):
+        source_key = value.get("source_key")
+        source = value.get("source")
+        if source_key and source:
+            value["source"] = self._sources.setdefault(source_key, source)
+
+        document_key = (
+            value.get("document_type"),
+            value.get("pid_v2"),
+            value.get("pid_v3"),
+            value.get("pid_generic"),
+            value.get("title_pid_generic"),
+        )
+        document = value.get("document")
+        document_identifiers = document_key[1:]
+        if document is not None and any(document_identifiers):
+            value["document"] = self._documents.setdefault(document_key, document)
+
+        user_session_id = value.get("user_session_id")
+        if user_session_id:
+            value["user_session_id"] = self._sessions.setdefault(
+                user_session_id,
+                user_session_id,
+            )
+
+        super().__setitem__(key, value)
diff --git a/metrics/counter/indexing/converter.py b/metrics/counter/indexing/converter.py
index 4b4ab1f..79dba6c 100644
--- a/metrics/counter/indexing/converter.py
+++ b/metrics/counter/indexing/converter.py
@@ -18,27 +18,26 @@ def convert(data):
     if not isinstance(data, dict):
         return {"month": {}, "year": {}}
 
-    month_data = {}
-    month_unique_state = _initialize_unique_state()
-    year_data = {}
-    year_unique_state = _initialize_unique_state()
+    month_data = _convert_granularity(data, "month")
+    year_data = _convert_granularity(data, "year")
+
+    return {"month": month_data, "year": year_data}
+
+
+def _convert_granularity(data, granularity):
+    converted_data = {}
+    unique_state = _initialize_unique_state()
 
     for value in data.values():
         pipeline = _get_pipeline(value)
         pipeline.accumulate(
-            data=month_data,
-            unique_state=month_unique_state,
+            data=converted_data,
+            unique_state=unique_state,
             value=value,
-            granularity="month",
-        )
-        pipeline.accumulate(
-            data=year_data,
-            unique_state=year_unique_state,
-            value=value,
-            granularity="year",
+            granularity=granularity,
         )
 
-    return {"month": month_data, "year": year_data}
+    return converted_data
 
 
 def _get_pipeline(value):
diff --git a/metrics/services/daily_metric_exports.py b/metrics/services/daily_metric_exports.py
index 8933b3d..7a14a21 100644
--- a/metrics/services/daily_metric_exports.py
+++ b/metrics/services/daily_metric_exports.py
@@ -1,4 +1,5 @@
 import logging
+from time import monotonic
 
 from metrics.models import DailyMetricJob
 from metrics.opensearch.client import OpenSearchUsageClient
@@ -60,6 +61,7 @@ def _load_or_build_payload(job, track_errors, robots_source):
 
 
 def _export_payload(job, payload):
+    opensearch_started = monotonic()
     search_client = OpenSearchUsageClient()
     if not search_client.ping():
         raise RuntimeError("OpenSearch client is not available.")
@@ -69,3 +71,8 @@ def _export_payload(job, payload):
         job=job,
         payload=payload,
     )
+    logging.info(
+        "Daily metric job %s OpenSearch export completed in %.3f seconds.",
+        job.pk,
+        monotonic() - opensearch_started,
+    )
diff --git a/metrics/services/daily_payloads.py b/metrics/services/daily_payloads.py
index f908f1f..0db8f22 100644
--- a/metrics/services/daily_payloads.py
+++ b/metrics/services/daily_payloads.py
@@ -32,16 +32,29 @@ def write_payload(storage_path, payload):
     resolved_path = resolve_storage_path(storage_path)
     resolved_path.parent.mkdir(parents=True, exist_ok=True)
 
-    payload_json = json.dumps(
-        payload, ensure_ascii=True, sort_keys=True, separators=(",", ":")
+    encoder = json.JSONEncoder(
+        ensure_ascii=True,
+        sort_keys=True,
+        separators=(",", ":"),
     )
-    payload_hash = hashlib.sha256(payload_json.encode("utf-8")).hexdigest()
-
+    payload_hash = hashlib.sha256()
     tmp_path = resolved_path.with_suffix(f"{resolved_path.suffix}.tmp")
-    tmp_path.write_text(payload_json, encoding="utf-8")
-    tmp_path.replace(resolved_path)
 
-    return payload_hash
+    try:
+        with tmp_path.open("wb") as output:
+            for chunk in encoder.iterencode(payload):
+                encoded_chunk = chunk.encode("utf-8")
+                payload_hash.update(encoded_chunk)
+                output.write(encoded_chunk)
+        tmp_path.replace(resolved_path)
+    except Exception:
+        try:
+            tmp_path.unlink()
+        except FileNotFoundError:
+            pass
+        raise
+
+    return payload_hash.hexdigest()
 
 
 def read_payload(storage_path):
diff --git a/metrics/services/parsing/job_payloads.py b/metrics/services/parsing/job_payloads.py
index fa30b3b..e3dc0ba 100644
--- a/metrics/services/parsing/job_payloads.py
+++ b/metrics/services/parsing/job_payloads.py
@@ -1,8 +1,10 @@
+import logging
 from time import monotonic
 
 from django.conf import settings
 
 from log_manager.models import LogFile
+from metrics.counter.access.daily_accumulator import DailyAccessAccumulator
 from metrics.counter.indexing import converter as index_docs
 from metrics.services import daily_payloads
 from metrics.services.parsing.environment import setup_parsing_environment
@@ -19,12 +21,13 @@
 def build_daily_metric_job_payload(job, robots_list, mmdb, track_errors=False):
     input_log_hashes = sorted(job.input_log_hashes or [])
     log_files = _get_job_log_files(job, input_log_hashes)
-    results = {}
+    results = DailyAccessAccumulator()
     summary = _initial_summary(log_files, input_log_hashes)
 
     mark_logs_as_parsing(log_files)
     clear_discarded_lines(log_files)
 
+    parsing_started = monotonic()
     for log_file in log_files:
         log_summary = _parse_log_file_into_results(
             log_file=log_file,
@@ -34,8 +37,19 @@ def build_daily_metric_job_payload(job, robots_list, mmdb, track_errors=False):
             track_errors=track_errors,
         )
         _merge_log_summary(summary, log_summary)
+    logging.info(
+        "Daily metric job %s parsing completed in %.3f seconds.",
+        job.pk,
+        monotonic() - parsing_started,
+    )
 
+    conversion_started = monotonic()
     documents = index_docs.convert(results)
+    logging.info(
+        "Daily metric job %s conversion completed in %.3f seconds.",
+        job.pk,
+        monotonic() - conversion_started,
+    )
     payload = _write_job_payload(job, documents, summary)
     return payload
 
@@ -125,6 +139,7 @@ def _merge_log_summary(summary, log_summary):
 
 
 def _write_job_payload(job, documents, summary):
+    serialization_started = monotonic()
     storage_path = daily_payloads.build_daily_storage_path(
         job.collection,
         job.access_date,
@@ -137,6 +152,11 @@ def _write_job_payload(job, documents, summary):
         "summary": summary,
     }
     payload_hash = daily_payloads.write_payload(storage_path, payload)
+    logging.info(
+        "Daily metric job %s serialization completed in %.3f seconds.",
+        job.pk,
+        monotonic() - serialization_started,
+    )
 
     job.input_log_hashes = summary["input_log_hashes"]
     job.storage_path = storage_path.as_posix()
diff --git a/metrics/tests/counter/access/test_accumulation.py b/metrics/tests/counter/access/test_accumulation.py
index ccf9044..a9eda44 100644
--- a/metrics/tests/counter/access/test_accumulation.py
+++ b/metrics/tests/counter/access/test_accumulation.py
@@ -161,7 +161,23 @@ def test_same_url_within_window_produces_single_url_bucket(self):
         raw = next(iter(results.values()))
         self.assertEqual(
             raw["click_timestamps_by_url"],
-            {"/id/c2248/03": {"00:05": 1, "00:20": 1}},
+            {"/id/c2248/03": {5: 1, 20: 1}},
+        )
+
+    def test_parses_datetime_string_and_stores_integer_seconds(self):
+        results = {}
+
+        accumulation.accumulate(
+            results,
+            self._book_counter_access(),
+            self._line(local_datetime="2024-01-15 10:01:05"),
+        )
+
+        raw = next(iter(results.values()))
+        self.assertNotIn("click_timestamps", raw)
+        self.assertEqual(
+            raw["click_timestamps_by_url"],
+            {"BOOK:Q7GTD|html|full_text": {65: 1}},
         )
 
     def test_generates_session_id_from_client_ip_datetime(self):
diff --git a/metrics/tests/counter/access/test_daily_accumulator.py b/metrics/tests/counter/access/test_daily_accumulator.py
new file mode 100644
index 0000000..c02c84d
--- /dev/null
+++ b/metrics/tests/counter/access/test_daily_accumulator.py
@@ -0,0 +1,68 @@
+from metrics.counter.access.daily_accumulator import DailyAccessAccumulator
+
+
+def _record(session_id, **overrides):
+    record = {
+        "collection": "scl",
+        "source_key": "1234-5678",
+        "document_type": "article",
+        "pid_v2": "S123456782026000100001",
+        "pid_v3": "abc123",
+        "pid_generic": None,
+        "title_pid_generic": None,
+        "source": {"source_id": "1234-5678", "main_title": "Journal"},
+        "document": {"title": "Article"},
+        "user_session_id": session_id,
+    }
+    record.update(overrides)
+    return record
+
+
+def test_interns_repeated_metadata_and_sessions():
+    accumulator = DailyAccessAccumulator()
+    first_session = "|".join(["Firefox", "1", "127.0.0.1", "2026-08-25", "10"])
+    second_session = "|".join(["Firefox", "1", "127.0.0.1", "2026-08-25", "10"])
+    assert first_session is not second_session
+
+    accumulator["first"] = _record(first_session)
+    accumulator["second"] = _record(second_session)
+
+    assert accumulator["first"]["source"] is accumulator["second"]["source"]
+    assert accumulator["first"]["document"] is accumulator["second"]["document"]
+    assert (
+        accumulator["first"]["user_session_id"]
+        is accumulator["second"]["user_session_id"]
+    )
+
+
+def test_interns_empty_document_metadata_for_the_same_document():
+    accumulator = DailyAccessAccumulator()
+
+    accumulator["first"] = _record("first", document={})
+    accumulator["second"] = _record("second", document={})
+
+    assert accumulator["first"]["document"] is accumulator["second"]["document"]
+
+
+def test_does_not_share_metadata_between_distinct_documents():
+    accumulator = DailyAccessAccumulator()
+
+    accumulator["first"] = _record("first", pid_v3="first", document={})
+    accumulator["second"] = _record("second", pid_v3="second", document={})
+
+    assert accumulator["first"]["document"] is not accumulator["second"]["document"]
+
+
+def test_does_not_share_documents_without_identifiers():
+    accumulator = DailyAccessAccumulator()
+    identifiers = {
+        "pid_v2": None,
+        "pid_v3": None,
+        "pid_generic": None,
+        "title_pid_generic": None,
+    }
+
+    accumulator["first"] = _record("first", document={}, **identifiers)
+    accumulator["second"] = _record("second", document={}, **identifiers)
+
+    assert accumulator["first"]["document"] is not accumulator["second"]["document"]
diff --git a/metrics/tests/services/test_daily_payloads.py b/metrics/tests/services/test_daily_payloads.py
new file mode 100644
index 0000000..98dfff6
--- /dev/null
+++ b/metrics/tests/services/test_daily_payloads.py
@@ -0,0 +1,55 @@
+import hashlib
+import json
+import tempfile
+from pathlib import Path
+
+from django.test import SimpleTestCase, override_settings
+
+from metrics.services import daily_payloads
+
+
+class DailyPayloadTests(SimpleTestCase):
+    def setUp(self):
+        self.temporary_directory = tempfile.TemporaryDirectory()
+        self.settings_override = override_settings(
+            MEDIA_ROOT=self.temporary_directory.name
+        )
+        self.settings_override.enable()
+
+    def tearDown(self):
+        self.settings_override.disable()
+        self.temporary_directory.cleanup()
+
+    def test_write_payload_preserves_canonical_bytes_and_hash(self):
+        payload = {
+            "collection": "scl",
+            "documents": {"á": {"total_requests": 2}},
+            "summary": {"valid_lines": 1},
+        }
+        expected = json.dumps(
+            payload,
+            ensure_ascii=True,
+            sort_keys=True,
+            separators=(",", ":"),
+        ).encode("utf-8")
+
+        payload_hash = daily_payloads.write_payload(
+            Path("scl/2026/08/2026-08-25.json"),
+            payload,
+        )
+
+        resolved_path = daily_payloads.resolve_storage_path(
+            Path("scl/2026/08/2026-08-25.json")
+        )
+        self.assertEqual(resolved_path.read_bytes(), expected)
+        self.assertEqual(payload_hash, hashlib.sha256(expected).hexdigest())
+
+    def test_write_payload_removes_temporary_file_after_serialization_error(self):
+        storage_path = Path("scl/2026/08/2026-08-25.json")
+
+        with self.assertRaises(TypeError):
+            daily_payloads.write_payload(storage_path, {"invalid": object()})
+
+        resolved_path = daily_payloads.resolve_storage_path(storage_path)
+        self.assertFalse(resolved_path.exists())
+        self.assertFalse(resolved_path.with_suffix(".json.tmp").exists())
diff --git a/requirements/base.txt b/requirements/base.txt
index cbc05bb..1228eda 100644
--- a/requirements/base.txt
+++ b/requirements/base.txt
@@ -69,7 +69,7 @@ git+https://github.com/scieloorg/scielo_log_validator@2.0.0#egg=scielo_log_valid
 git+https://github.com/scieloorg/scielo_scholarly_data@v0.1.4#egg=scielo_scholarly_data
 
 # SciELO Usage COUNTER
-git+https://github.com/scieloorg/scielo_usage_counter@2.1.0#egg=scielo_usage_counter
+git+https://github.com/scieloorg/scielo_usage_counter@2.2.0#egg=scielo_usage_counter
 
 # Device Detector
 device-detector==0.10  # https://github.com/thinkwelltwd/device_detector