Keith,
I was thinking about that a year or so ago...do you think there'd be any
problems with modifying the batch scanners to share a thread pool per
JVM? Or be able to pass in a thread pool. I think the reason was we were
trying to limit the client scans threads globally in the JVM. But it
hasn't been a huge issue.
Andrew
On 1/16/19 10:27 AM, Keith Turner wrote:
On Mon, Jan 14, 2019 at 2:05 PM gtotsline <[email protected]> wrote:
Hi -
Can Scanners / Batch Scanners be reused? Is there any downside to reusing a
scanner (e.g. poorer performance)? I assume creating a scanner takes time,
so asking this question to see if I can avoid needlessly recreating a
BatchScanner every time I do a query.
The main difference I can think of is that each batch scanner instance
creates a thread pool. Other resources like tablet server connection
pools and tablet location caches are shared between batch scanner
instances.
Thanks!
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