On 14/02/2017 14:36, Daniel Tryba wrote:
On Tue, Feb 14, 2017 at 02:27:59PM +0100, Igor Potjevlesch wrote:
Looks to be a good idea. I use MySQL and MyISAM, so I understand that async is supported.
Async (db_insert_mode=2) is supported with any (acc)backend.
To be accurate, not all backends support it, because they need to export a function for async operations. I did it for mysql.
Cheers, Daniel
With myisam you can use delayed inserts (db_insert_mode=1). But without even looking at the kamailio implementation I'd guess that 2 is the better choice in the hope that the sql operation is entirely done in an other thread, with 1 there might be the chance that setting up/reusing connections might block (since insert delayed is a feature on the mysql server side that just returns an OK before any writes to disk).
How should I dimension the number of async_workers?
I set it to 2, but for acc and a few async sql_ops calls that should be overkill. I have no metrics to make a better assumption on the number of worker threads.
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