The number of regions for an HBase table is driven by the Section 2.5.2.6, “Bigger Regions”. Also, see the architecture section on Section 9.7.1, “Region Size”

For larger systems, managing compactions and splits may be something you want to consider.

See Section 2.5.2.3, “hbase.regionserver.handler.count”.

See ???. A memory setting for the RegionServer process.

See ???. This memory setting is often adjusted for the RegionServer process depending on needs.

See ???. This memory setting is often adjusted for the RegionServer process depending on needs.

See ???. If there is blocking in the RegionServer logs, increasing this can help.

See ???. If there is enough RAM, increasing this can help.

Have HBase write the checksum into the datablock and save having to do the checksum seek whenever you read. See the release note on HBASE-5074 support checksums in HBase block cache.