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Streamlit Version 1.49.1
Python Version 3.13.7
I searched for the issue on all known databases without success 
I am facing the following issue with st.file_uploader:
When I am uploading a File about 600MB the RAM usage is after I selected the File about 660 MB.
At the moment I pressed the upload button the RAM usage increases up to 1800MB.
After the Upload is done, the RAM usage stays at 660MB.
If I close the browsertab it stays at 660MB, only when I close the streamlit instance the RAM gets free.
I tryed several solutions:
- clear_on_submit=True
- working with session state keys
- gc.collect()
- st.rerun()
The phenomenon is:
If I set the clear_on_submit=false and deactivate the st.rerun() I am able to delete the File in the Widget and only then the file gets deleted from the RAM.
I tested it with a simple Upload code with the same result.
Actually I have no idea how to fix this, can somebody help?
here my Upload Code:
-------- Upload-Helper --------
def save_uploaded_file(file, folder):
os.makedirs(folder, exist_ok=True)
save_path = os.path.join(folder, file.name)
with open(save_path, "wb") as f:
shutil.copyfileobj(file, f)
return save_path
def unified_upload(device_id):
st.subheader(“
Dokument hochladen”)
# Dokumenttypen + erlaubte Dateiendungen
doc_types = {
"Firmware": {"label": "💾 Firmware", "allowed_types": ["zip", "pdf"]},
"Manual": {"label": "📘 Servicemanual", "allowed_types": ["pdf"]},
"Partslist": {"label": "🛠️ Partslist", "allowed_types": ["pdf"]},
"Bulletin": {"label": "📑 Bulletin", "allowed_types": ["pdf"]},
}
# Upload-Counter initialisieren
if "upload_counter" not in st.session_state:
st.session_state.upload_counter = {}
if device_id not in st.session_state.upload_counter:
st.session_state.upload_counter[device_id] = 0
# Dropdown zur Auswahl des Dokumententyps
doc_choice = st.selectbox(
"Dokumenttyp auswählen",
options=list(doc_types.keys()),
format_func=lambda x: doc_types[x]["label"],
index=None,
placeholder="Bitte auswählen...",
key=f"doc_select_{device_id}"
)
if not doc_choice:
st.info("Bitte zuerst den Dokumenttyp auswählen ⬆️")
return
# Zielordner für Gerät & Typ
folder = os.path.join(r"D:\ServiceInfoToolData", str(device_id), doc_choice)
os.makedirs(folder, exist_ok=True)
# Dynamischen Key für file_uploader
file_key = f"file_upload_{device_id}_{doc_choice}_{st.session_state.upload_counter[device_id]}"
# Upload-Formular mit Auto-Reset
with st.form(f"upload_form_{device_id}_{doc_choice}", clear_on_submit=True):
file = st.file_uploader(
f"{doc_types[doc_choice]['label']} hochladen",
type=doc_types[doc_choice]["allowed_types"],
key=file_key
)
title = st.text_input("Titel (optional)")
submitted = st.form_submit_button("Speichern")
if submitted:
if file is None:
st.error("Bitte eine Datei auswählen.")
else:
save_path = save_uploaded_file(file, folder)
# DB-Eintrag speichern
conn = get_connection()
try:
conn.execute(
"""
INSERT INTO serviceinfos
(geraet_id, typ, dateiname, pfad, uploaded_at, version)
VALUES (?,?,?,?,?,?)
""",
(
device_id,
doc_choice,
file.name,
save_path,
datetime.now().strftime("%Y-%m-%d %H:%M:%S"),
title.strip() or None,
),
)
conn.commit()
finally:
conn.close()
# Upload-Counter hochzählen, damit nächster Upload einen neuen Key bekommt
st.session_state.upload_counter[device_id] += 1
# Speicher freigeben
del file
st.session_state._uploaded_file_mgr = UploadedFileManager()
gc.collect()
st.rerun()
st.success(f"{doc_types[doc_choice]['label']} hochgeladen ✅")
