Posted by peter |
…to keep into account while using
MyISAM tables.
Recovery. MySQL was running stable…and go for long unnoticed with
MyISAM storage engine. This hidden corruption may… further data corruption.
Partial updates.
MyISAM is does not have transactions …
Posted by Vadim |
…next releases)
Compilation parameters:
For
MyISAM / InnoDB
./configure –prefix=/usr/local…mysqlperformanceblog.com/files/benchmarks/innodb-
myisam-falcon.html
(Note: This benchmark…will be fixed before release.
MyISAM shows stable result.
InnoDB is…
Posted by peter |
…move to Innodb and when staying on
MyISAM is preferred ?
I generally prefer to see…for all long reporting queries. In case
MyISAM was chosen not just happened to … Innodb tuning. Innodb needs tuning. Really.
MyISAM for many applications can work well …
Posted by peter |
… computing stats:
mysql> show variables like “
myisam_stats_method”;
+———————+—————+
| Variable_name | Value |
… dropped significantly.
This means Innodb and
MyISAM have different stats computation method by …
Posted by Vadim |
… created indexes.
Load time for
MyISAM: 16608 sec
For TokuDB: 19131 … data TokuDB will be faster
MyISAM.
Now to queries. Bradley pointed…you are interested to compare
MyISAM with previous engines:
QueryMyISAMMonetDBInfoBrightLucidDBInfiniDB
Q072…
Posted by Vadim |
…’s why we did not escalate
MyISAM scalability question. This time working on …id`),
KEY `id` (`id`,`stat`)
) ENGINE=
MyISAM;
CREATE TABLE `t2` (
`id` int(11… (`id`),
KEY `val` (`val`)
) ENGINE=
MyISAM AUTO_INCREMENT=4097
Table t1 contains…
Posted by peter |
…` (`i`),
KEY `c` (`c`)
) ENGINE=
MyISAM DEFAULT CHARSET=utf8;
select count(t1…and using hash, which is faster
MyISAM does compression for character keys which…it perform slower for random lookups
MyISAM generally has lower processing overhead due…
Posted by peter |
…bit longer rows is frequent reason of
MyISAM performing better than Innodb. In this article…some kind of special hack
The fact
MyISAM will by default compress string keys …` (`c`),
KEY `id` (`id`)
) ENGINE=
MyISAM
Index size:
PACK_KEYS=DEFAULT – …
Posted by
peter @ 3:05 pm ::
myisam ::
Posted by Baron Schwartz |
…. I wanted to see how fast
MyISAM vs. MonetDB would interpret really large INSERT …a graph of the times (smaller is better):
MyISAM took 88 seconds, MonetDB took 200, … table on disk (smaller is better):
MyISAM is 787MB, MonetDB is 791MB, and …
Posted by Vadim |
… know
MyISAM does not cache data, only indexes.
MyISAM assumes OS cache is good enough and uses …for the datafiles. That can be enabled by –
myisam_use_mmap=1 startup option.
In this case instead of systems call
MyISAM will use memcpy function. There is a …
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