Python-binance: Have you found a limit in the number of websocket connections you can open at once?

[skeller88]

Since each websocket is for a single symbol, I'd like to open a trades websocket for each symbol. But that's over 100 websockets, and I'm not sure if that's possible. That information would be a good addition to the documentation.

[K-Kit]

I have about ~300 running in the program i'm working on right now no problem, and one of my testers runs 3 instances at the same time so thats ~900 sockets on 1 machine

[wranai]

You can run a single socket for multiple symbols:

socket_manager.start_multiplex_socket(['btcusdt@aggTrade','ethbtc@aggTrade','!miniTicker@arr@3000ms'], handler)

[K-Kit]

Is the multiplex socket actually any more efficient than separate sockets? I thought it was just an easier way of managing multiple sockets but I know roughly nothing about how websockets actually work

[wranai]

It opens a single connection, so yes.

[ron7684]

In my experience, the number of file descriptors is the limiting factor. No issues opening a websocket for each symbol.

[oliver-zehentleitner]

my experience is, you can start as much websockets as you like. only with userdata streams you have to keep in mind, that they cause a weight cost of 1 each time they do a "keepalive" (~30min). so the more userdata streams you have that do independen keepalive tasks you accumulate weight costs.

i had up to 10 machines with up to 20 active webstreams (with multiplex webstreams for 100s of trading_pairs) from one IP and had no issues. the only thing i found, you have to care is how much webstreams are used through one websocket. There i found a max lenght for the URI of 8004 signs.

[skeller88]

Update: I'm subscribing to 555 pairs successfully with no issues. Haven't hit a limit yet.

[ivanoffam]

I subscribed at 250 pairs but receive just for 3-4... There are no exceptions

[goktugyil]

Reached 1400 here: https://colonist.io/

Seems to be affected heavily by cpu, memory, bandwidth. When one of those resources aren't enough, I start getting disconnections.

[knowledgecomputer2018]

hi
i have problem in websocket :
indexingerror-unalignable-boolean-series-provided-as-indexer-index-of-the-bool

after priod time while:
while():
df = price['BTCUSDT']
mask=df.date >= start_time #type(mask)=series
df2 =df.loc[mask] #?????

after 10 or 50 period is good but after n minute:
df.index> mask.index then mask do not operate over df . (df.index +1=mask.index)
i do not know why????
god willing