maria-discuss team mailing list archive

[Justin Swanhart <greenlion@xxxxxxxxx>]

When is this system getting fixed?  Having to log into web to answer email is idiotic...

Sent from my iPhone

> On Aug 19, 2016, at 8:52 PM, Justin Swanhart <greenlion@xxxxxxxxx> wrote:
> 
> Oh yeah, this stupid system where I have to log into the web.  So much stupid around here.
> 
>> On Fri, Aug 19, 2016 at 11:52 PM, Justin Swanhart <greenlion@xxxxxxxxx> wrote:
>> If you are using Galera, then aborted transactions due to lock conflict are reported as deadlocks.
>> 
>> Temporary tables are not shared between connections and can not cause deadlocks.
>> 
>> --Justin
>> 
>>> On Fri, Aug 19, 2016 at 7:50 PM, AskMonty KB <noreply@xxxxxxxxxxxx> wrote:
>>> Hello,
>>> 
>>> A new question has been asked in "MariaDB Knowledge Base" by WebtrendsData. Please answer it at http://mariadb.com/kb/en/lockingdeadlocking-on-temp-tables/ as the person asking the question may not be subscribed to the mailing list.
>>> 
>>> --------------------------------
>>> Hello - I am coming up to speed on MariaDB, I have a MS Sql Server and Hadoop background but we are starting to use MariaDB heavily. We have some queries that hit tables with mediumtext datatype columns. My understanding is these types of queries will always generate temp tables directly to disk (because of the text/blob types). I've confirmed our temp table engine is Aria.
>>> 
>>> From what I've read, in the mysql world, this situation would end up with a MyIsam table on disk, which does not have row locking, only table locking. I've tried looking for info on how Aria tables would handle this as I suspect we are getting deadlocks on these tables. Our application is reporting many database deadlocks, our entire database is all ExtraDB tables, yet SHOW ENGINE INNODB STATUS does not report any deadlocks, which leads me to think it is the temp tables.
>>> 
>>> So I guess my question is, does the Aria engine do row locking? Is it possible to get a status similar to SHOW ENGINE INNODB STATUS? Please forgive me if this is painfully obvious or unclear (I'm still learning!), and thank you for your time.
>>> -Aaron
>>> 
>>> --------------------------------
>>> 
>>> To view or answer this question please visit: http://mariadb.com/kb/en/lockingdeadlocking-on-temp-tables/
>>> 
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>