BCH Stress Test Clogs Network
A stress test clogged the Bitcoin Cash network over the weekend.
Transactions exceeded usual volumes more than 10 times:
But this time stress test caused significant mempool congestion:
Reddit users discovered that three large BCH pools produce blocks with default configuration settings that limits size to 2MB:
Jameson Lopp @lopp recapped this stress test as following:
- Bottlenecks caused services such as the transaction generators to slow & error out, preventing mempool from exceeding 22 MB
- Largest block: 21.35 MB
- Avg block size was ~3.6 MB: 11% of max capacity
- 16% of Bitcoin ABC nodes dropped off the network
The BCH network is secured by 1,463 nodes, of which 764 are following the Bitcoin ABC version.
ABC upgrades limit block size to 2 MB by default, although there is no limit and larger blocks are allowed when needed.
Bitcoin SV chain that branched off last November is setting large blocks as a goal.
An extreme devactivity spike can be seen 10 days before test: