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Home -> Community -> Mailing Lists -> Oracle-L -> Re: Oracle OCI JDBC Driver Not Recommended for Multiprocessor Machine
I guess they think that no one should use TAF, which requires the thick
driver.
The poor scalability of the app couldn't have anything to do with the application.
Could it? ;)
Jared
Rick Stephenson <RStephenson_at_Ovid.com>
Sent by: root_at_fatcity.com
04/02/2003 07:28 AM
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Subject: Oracle OCI JDBC Driver Not Recommended for Multiprocessor Machine
Sun's FAQ on java hotspot VM performance (http://java.sun.com/docs/hotspot/PerformanceFAQ.html) includes this interesting question:
My application uses a database and doesn't seem to scale well. What could
be going on?
Oracle provides two types of database drivers: a type-2 driver, called the
OCI (Oracle Call Interface) driver that utilizes native code, and a type-4
pure Java driver called the thin driver. In single processor environments,
the thin driver works somewhat better than the OCI driver because of the
JNI overhead associated with the OCI driver. On multi-processor
configuations, synchronization points within Solaris used by the OCI
driver become big bottlenecks and prevent scaling. We recommend using the
thin driver in all cases.
Is this actually the case? Does anyone have more information on this?
Thanks,
Rick Stephenson
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