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Re: [PHP] LOCKS???




On Sun, Nov 27, 2016 at 6:37 PM, Tedd Sperling <tedd.sperling@xxxxxxxxx>
wrote:

> Hi gang:
>
> I’ve read a bunch about MYSQL LOCKs, but I can seem to get them to work.
>
> For example, I have two computers accessing the same host (i.e., thus each
> with different SIDs) and accessing two different scripts. One script
> performs a "LOCK TABLES t WRITE" and the second script tries to read TABLE
> t. While the LOCK is in place, the second script has no problem reading and
> writing to TABLE t.
>
> I don’t understand what's wrong — any ideas?
>
> Thanks,
>
> tedd
> _______________
> tedd sperling
> tedd.sperling@xxxxxxxxx
>
>
>
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>
You are running a LOCK on writes, not reads, so the second script is
performing fine.

Also you don't need multiple sessions to test LOCK mechanism, should be
able to test it with just 1 session.

http://dev.mysql.com/doc/refman/5.7/en/lock-tables.html