Difference between revisions of "Performance tuning"

Set compression=lz4 on your pools' root datasets so that all datasets inherit it unless you have a reason not to enable it. Userland tests of LZ4 compression of incompressible data in a single thread has shown that it can process 10GB/sec, so it is unlikely to be a bottleneck even on incompressible data. Furthermore, incompressible data will be stored without compression such that reads of incompressible data with compression enabled will not be subject to decompression. Writes are so fast that in-compressible data is unlikely to see a performance penalty from the use of LZ4 compression. The reduction in IO from LZ4 will typically be a performance win.  

Note that larger record sizes will increase compression ratios on compressible data by allowing compression algorithms to process more data at a time.