bitcoin core – Resolve BTC long memory pool (lots of unconfirmed messages)

I started with the Bitcoin exchange service, creating rawtransaction and broadcasting it. The problem I have to deal with is the mempool string too long (more than 25 unconfirmed transactions), for example:
64: chain too long

Using limitancestorcount and limitdescendantcount Just solve on the local node, these late txs (transaction after the first 25) have to wait a long time to be rebroadcast like this:
Transaction not found in blockchain

Here is my testnet address has a lot of unconfirmed txs and still waiting, if I search on another explorer, I can not see 45 unconfirmed txs, same for getrawtransaction on the node, respose is No such mempool or blockchain transaction:

https://live.blockcypher.com/btc-testnet/address/mxHqrQBWuCndNaubTYUbcEVzeNPsT34TP6/

So, how can I avoid this problem, I just think of several methods, such as: divide the main address into a few sub-addresses, which divides the main UTXO into a few UTXOs, create a many-to-many transaction (currently 1 to 2, 1 target and 1 changeAddress back), using UTXO first with high confirmation, … Which options can bring better results and performance for a long scaling? term? Any advice is really appreciated. And last question, is there a way to mark 1 UTXO used 25 times (for example, I use UTXO X first, then it is returned, Y is used, Z is returned, total using X = 2, I have no related information to calculate it because the node returns, UTXO only contains txId).

python – Calculation of the loss after several lots

I use pytorch to implement a special template.
A demo code is provided to show the idea.

def calculate_one_bag(loader: DataLoader):
    max_ans = torch.tensor(0.0).to(device)
    for i, data in enumerate(loader):
        inputs = data.to(device)
        max_ans = torch.max(max_ans, torch.max(net(inputs)))

a = calculate_one_bag(loader1)
b = calculate_one_bag(loader2)

loss = criterion(a, b)
loss.backward()

It seems that each loop consumes GPU memory and the GPU overflows.
How can I solve this problem?

Wallet – My husband is dead, I have lots of codes and words … help

I will not post any codes here, so please do not ask.

So, my husband has several applications in one folder –

Tronwallet
Telegram
Guild Chat
Coinbase
biance
Google Authenticator

He kept talking about tron, etc., I never paid much attention. He gave me codes and so on. because "if something happened and you did not have them, they would be lost" … again … I did not pay much attention … he was 43 years old and was in perfect health.

Now I have his phone, these apps and these codes and no idea what to do.

I can not connect to the wallet tron ​​… he did not give me 6 digit pin.

Do not excite me too much, but I have no idea what is going on here.

I guess the first step to enter the wallet?

macos – lots of errors after sudo bash in the terminal

I want to execute a lot of terminal commands without having to put sudo in front of each command.

I do sudo bash, but my .bashrc script generates many errors.

Here is my .bashrc file

mac $ cat .bashrc
#! /bin/bash
# ~/.bashrc: eyecuted by bash(1) for non-login shells.
#    see /usr/share/doc/bash/eyamples/startup-files (in the package bash-doc)
#    for eyamples
echo "in .bashrc but claims to be $0"
/usr/bin/id
which id
echo "the path is $(pwd)"
echo "$PS1 variable is ${PS1}"
echo "$SHELL variable is ${SHELL}"
echo -e "the path is: n  $PATH"
echo $USER
echo "end of this script."


# how to display an existing function
# declare -f highlightExitCode
highlightExitCode()
    {
        exit_code=$?
        if ( $exit_code -ne 0 )
        then
           echo -en " RC=${exit_code} "'xf0x9fx98xb1x20'
        else
           echo -en ""
        fi
    }mac $ 

exit form being executed …

mac $ sudo bash
in .bashrc but claims to be bash
: No such file or directory
the path is /Users/mac
$PS1 variable is u$(highlightExitCode) $ 
$SHELL variable is /bin/bash
the path is: 
  /Library/Frameworks/Python.framework/Versions/3.7/bin:/Library/Frameworks/Python.framework/Versions/2.7/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/opt/X11/bin:/Developer/Tools:/Users/mac/.nexustools
root
end of this script.
: command not found
: command not found
'ash: /Users/mac/.bashrc: line 18: syntax error near unexpected token `
'ash: /Users/mac/.bashrc: line 18: `highlightExitCode()
bash: highlightExitCode: command not found
root # 

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performance – Linux VM too slow (vmware) with lots of resources available

I've had a problem with my virtual machine and I'm short of imagination about what may be causing it.

My virtual machine is version 6.9 of Red Hat Enterprise Linux Server (Santiago).

Kernel: 2.6.32-696.30.1.el6.x86_64

Here are my VM specifications:
6 CPUS:

Model Name: E7- 2850 @ 2.00GHz Processor for Intel (X) Xeon (R)
Model Name: E7- 2850 @ 2.00GHz Processor for Intel (X) Xeon (R)
Model Name: E7- 2850 @ 2.00GHz Processor for Intel (X) Xeon (R)
Model Name: E7- 2850 @ 2.00GHz Processor for Intel (X) Xeon (R)
Model Name: E7- 2850 @ 2.00GHz Processor for Intel (X) Xeon (R)
Model Name: E7- 2850 @ 2.00GHz Processor for Intel (X) Xeon (R)

47G of RAM.

Currently, the processor is beautiful, I have not yet loaded all my applications.

                Cpu0: 0.8% us, 2.1% sy, 0.0% ni, 96.8% id, 0.3% wa, 0.0% hi, 0.0% if, 0.0% st
Cpu1: 0.6% us, 1.2% sy, 0.0% ni, 97.9% id, 0.3% wa, 0.0% hi, 0.0% if, 0.0% st
Cpu2: 0.8% us, 1.1% sy, 0.0% ni, 97.7% id, 0.4% wa, 0.0% hi, 0.0% if, 0.0% st
Cpu3: 0.4% us, 0.6% sy, 0.0% ni, 93.2% id, 0.1% wa, 0.0% hi, 5.6% if, 0.0% st
Cpu4: 0.7% us, 2.3% sy, 0.0% ni, 96.6% id, 0.4% wa, 0.0% hi, 0.0% if, 0.0% st
Cpu5: 0.6% US, 0.8% Sy, 0.0% ni, 98.3% id, 0.3% wa, 0.0% hi, 0.0% if, 0.0% st
Mem: 49422016k total, 6087036k used, 43334980k free, buffers 51044k
Swap: 16777208k in total, 0k used, 16777208k free, 1639364k cached

The memory is good too:

total used cached free shared buffers
Mem: 47G 5.8G 41G 228K 50M 1.6G
- / + buffers / cache: 4.2G 42G
Exchange: 15G 0B 15G

I'm running top, vmstat, sar, iotop and these statistics look good, but the virtual machine is pretty slow, even a simple search for yum takes forever, to the point that cntl + c is struggling to end the session.

Here are some vmstat (5sec)
procs ----------- memory ---------- --- swap-- ----- io ---- --system-- ----- cpu -----
r b swpd free buffer cache if si bi bo in cs us sy id wa st
1 0 0 43174780 51656 1794176 0 0 11 20 150 192 1 2 97 0 0
5 0 0 43167188 51696 1800668 0 0 586 928 1012 1043 2 3 92 3 0
1 0 0 43157116 51728 1809716 0 0 947 2144 854 1021 0 3 94 3 0
4 0 0 43147792 51736 1819384 0 0 947 2693 1304 1087 1 3 93 3 0
1 0 0 43138252 51752 1828816 0 0 949 16 786 1046 0 3 95 2 0

If you see, the server is almost inactive, but for some strange reason, things take forever.

For example, a yum search nc

real 0m52.324s
0m12.564s user
sys 0m34.598s

While my other VM takes 2 seconds.

0m2.336s real
0m0.871s user
sys 0m0.394s

Any help is greatly appreciated!