Bad_alloc error on RPi

### Expected behavior
Expect to run without exceptions

### Actual behavior
Got std::bad_alloc error

Configuration
- Runs on Raspberry Pi 3 (CPU: 4× ARM Cortex-A53, 1.2GHz, 1GB LPDDR2 (900 MHz))
- Used recommended parameter
// Optimization functions (https://github.com/facebook/rocksdb/blob/313e8772856524d1a05419b11e4837ed4030427b/options/options.cc#L468)
DBOptions* DBOptions::OptimizeForSmallDb() {
max_file_opening_threads = 1;
max_open_files = 5000;
return this;
}

ColumnFamilyOptions* ColumnFamilyOptions::OptimizeForSmallDb() {
write_buffer_size = 2 << 20;
target_file_size_base = 2 * 1048576;
max_bytes_for_level_base = 10 * 1048576;
soft_pending_compaction_bytes_limit = 256 * 1048576;
hard_pending_compaction_bytes_limit = 1073741824ul;
return this;
}
- This is running inside a docker container
- This bad alloc error happens randomly and at least shows up after my container runs more than 1.5 hour.
- I don't see high memory consumption by the docker container.

Questions
- Turned on Dump Statistics; what data should I share/monitor?
- Any recommended configuration parameters I should use?
- Any config parameter can be used to limit max memory usage?