February 24, 2012 – 18:29
Daylight Saving Time in Russia has been changed last year. Oracle published a FAQ on the support site about this: Russia abandons DST in 2011 – Impact on Oracle RDBMS [ID 1335999.1].
Starting with Oracle 11gR1 Oracle JVM includes Just-in-Time compiler. Its goal is to convert JVM bytecode into platform-specific native code based on the performance data gathered in run-time. It is stated in the documentation that JIT “enables much faster execution” – and this is, in general, true. There are ways to control the behavior of [...]
There’s a thread on the OTN forum with a case of amusing behavior of the 11.2.0.1 JDBC driver: it fails to detect properly all bind variables in an SQL statement referencing column named NORDER. WTF?! PS. 1) Oracle’s SSO is actually Multi Sign-On because I have two accounts (one for OTN forums and one for [...]
Another press release from Oracle on the same topic: benchmark of WLS 10.3.3 (not released yet) + Oracle 11.2.0.1 @ Dell PowerEdge R910 Server with 4×8-core beasts X7560 (announced today by Intel). Benchmark was done by Oracle itself (previous were conducted by Cisco & HP). Results and FDA are here. DB & WLS configuration are [...]
Today Oracle announced this press release. Cisco Systems tested WebLogic SE 10.3.3 (not available yet) + single-node Oracle 11gR2 @ Cisco UCS C250 M2 Rackmount Server with 2×6-core Intel Xeon X5680 (not available yet) – here are the results. I want to highlight some specifics about this test bed – after all, it’s interesting to [...]
Table collection expression has been in Oracle for more than 10 years. It is handy for passing an array to Oracle. Quite often, though, there is was a well-known problem with a default cardinality associated with table collection expressions used in the SQL.
A question on Edition-Based Redefinition appeared on the OTN forum: The purpose is to try to upgrade an app in production. For most application users they will keep using the pre-upgrade app connecting to the old edition by default, while at the same time some UAT users will test out the post-upgraded app on the [...]
If you were an Oracle developer and you were asked to implement a small part of the JDBC driver functionality – the getIndexInfo() method of the java.sql.DatabaseMetaData interface – how’d you do that?
December 14, 2009 – 22:27
JNI – Java Native Interface – is an interface for cooperating Java and legacy code. Oracle RDBMS doesn’t support it officially in embedded Oracle JVM (aka “Aurora”): Oracle Database does not support the use of JNI in Java applications. If you use JNI, then your application is not 100 percent pure Java and the native methods [...]
Recently I’ve struggled with subj. One of the customers of the company I’m working has encountered several “java.lang.OutOfMemoryError: unable to create new native thread” appearances in a clustered WebLogic Server 9 environment. Here I’ll describe why it could happen and possible workarounds for this error.
