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max_iops
Maximum I/O operations per second, for I/O throttling. Optional, default is 0 (unlimited).
I/O throttling related option. It limits maximum count of I/O operations (reads or writes) per any given second. A value of 0 means that no limit is imposed.
indexer can cause bursts of intensive disk I/O during
indexing, and it might desired to limit its disk activity (and keep something
for other programs running on the same machine, such as searchd).
I/O throttling helps to do that. It works by enforcing a minimum guaranteed
delay between subsequent disk I/O operations performed by indexer.
Modern SATA HDDs are able to perform up to 70-100+ I/O operations per second
(that's mostly limited by disk heads seek time). Limiting indexing I/O
to a fraction of that can help reduce search performance degradation
caused by indexing.
Example:
max_iops = 40
