Hello, I would like to present yet another JDBCAppender which supports batch updates of JDBC 2.0.
/**
* There are 2 way of configuring of the database conection:
* 1) dataSource + optional initialContextFactory, providerUrl,
* securityPrincipal and securityCredentials
* 2) driver + usr + optional username and password
* The connection can be reused or obtained new every time. This is controlled
* by reuseConnection property.
* sql property specifies which SQL statement is executed for each insert.
* values property contains format characters for the insert statement.
* Following characters are supported: c,C,d,m,p,r,t,x. They have the same meaning
* as by {@link org.apache.log4j.PatternLayout}. There is a special '#' character
* which is responsoible for automatic generation of primary keys.
* JDBCAppender supports 2 optimizations:
* 1) bufferSize > 1 and batchMode=true forces Appender to use batch updates
* feature of JDBC 2.0. It can bring a huge performance improvement, but unfortunately
* this feature is not supported by all database drivers.
* 2) idHandler + sequenceName + creationRange are used for determining of primary
* keys. For Oracle databases the JDBCOracleIDHandler can be used. Sequence must
* exist in the database.
* A refresh thread is used to keep connection alive (only if reuseConnection=true),
* which executes an SQL Statement "select count(*) from testTable" after
refreshMinutes
* period. If the buffer is not empty, then pending entries will be written into
* the database.
* There are 2 additional properties dropTable and createTable, which contain SQL
* statements, which are executed during appender initialization. This properties
* should be used only for test purposes.
*/
Hier are some test results:
// Access from PC to remote Oracle Database on SUN.
// 500 logs (10 Threads x 10 Iterations x 5 log entries)
// bufferSize = 1, creationRange = 1 --> time = 40.594 s
// bufferSize = 10, creationRange = 1 --> time = 30.032 s
// bufferSize = 1, creationRange = 10 --> time = 12.781 s
// bufferSize = 10, creationRange = 10 --> time = 4.047 s
// bufferSize = 20, creationRange = 20 --> time = 3.062 s
// bufferSize = 50, creationRange = 50 --> time = 1.328 s
Any feedback is appreciated.
Regards,
Dmitry Valdin
(See attached file: JDBCAP~1.ZIP)
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