Miners: offline, not displayed, connection failure, low hashrate, worker number discrepancy

If you have questions related to offline, not displayed, connection failure, low hashrate, and worker number discrepancy, you can refer to the following:

Offline

• Miner operating but offline in the pool
• Goldshell AE series miners offline

Not displayed

• Why are there no hashrate and online miners shown?

Connection failure

• How to customize initial difficulty for KAS Miners (ASIC)
• Can I mine with my mobile devices?
• Can I mine Bitcoin or Litecoin with my laptop or GPU miner?

Low hashrate

• Why is the hashrate shown in the mining pool lower than the local hashrate of the miner?
• Local hashrate, 15 minutes hashrate, 24 hours hashrate, rejection rate
• What is delayed share, and what is the reasonable range of it?

Worker number discrepancy

• Why does the number of workers differ from the number of miners that are actually mining?
• How do I add a worker and set a worker name?