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h2/src/docsrc/html/performance.html
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......@@ -38,54 +38,54 @@ Please note this is mostly a single connection benchmark run on one computer.
<h3>Embedded</h3>
<table border="1" class="bar">
<tr><th>Test Case</th><th>Unit</th><th>H2</th><th>HSQLDB</th><th>Derby</th></tr>
<tr><td>Simple: Init</td><td>ms</td><td>610</td><td>657</td><td>3187</td></tr>
<tr><td>Simple: Query (random)</td><td>ms</td><td>297</td><td>312</td><td>1828</td></tr>
<tr><td>Simple: Query (sequential)</td><td>ms</td><td>203</td><td>266</td><td>1766</td></tr>
<tr><td>Simple: Update (random)</td><td>ms</td><td>1078</td><td>1484</td><td>22031</td></tr>
<tr><td>Simple: Delete (sequential)</td><td>ms</td><td>234</td><td>281</td><td>7407</td></tr>
<tr><td>Simple: Memory Usage</td><td>MB</td><td>6</td><td>7</td><td>11</td></tr>
<tr><td>BenchA: Init</td><td>ms</td><td>859</td><td>438</td><td>4047</td></tr>
<tr><td>BenchA: Transactions</td><td>ms</td><td>5266</td><td>2875</td><td>17500</td></tr>
<tr><td>BenchA: Memory Usage</td><td>MB</td><td>9</td><td>14</td><td>10</td></tr>
<tr><td>BenchB: Init</td><td>ms</td><td>4016</td><td>2687</td><td>16875</td></tr>
<tr><td>BenchB: Transactions</td><td>ms</td><td>2609</td><td>3282</td><td>4250</td></tr>
<tr><td>BenchB: Memory Usage</td><td>MB</td><td>9</td><td>10</td><td>8</td></tr>
<tr><td>BenchC: Init</td><td>ms</td><td>891</td><td>594</td><td>5766</td></tr>
<tr><td>BenchC: Transactions</td><td>ms</td><td>4359</td><td>75438</td><td>11718</td></tr>
<tr><td>BenchC: Memory Usage</td><td>MB</td><td>9</td><td>18</td><td>9</td></tr>
<tr><td>Executed statements</td><td>#</td><td>594255</td><td>594255</td><td>594255</td></tr>
<tr><td>Total time</td><td>ms</td><td>20422</td><td>88314</td><td>96375</td></tr>
<tr><td>Statements per second</td><td>#</td><td>29098</td><td>6728</td><td>6166</td></tr>
<tr><td>Simple: Init</td><td>ms</td><td>547</td><td>532</td><td>2594</td></tr>
<tr><td>Simple: Query (random)</td><td>ms</td><td>250</td><td>391</td><td>1515</td></tr>
<tr><td>Simple: Query (sequential)</td><td>ms</td><td>188</td><td>313</td><td>1406</td></tr>
<tr><td>Simple: Update (random)</td><td>ms</td><td>812</td><td>1750</td><td>17704</td></tr>
<tr><td>Simple: Delete (sequential)</td><td>ms</td><td>203</td><td>250</td><td>8843</td></tr>
<tr><td>Simple: Memory Usage</td><td>MB</td><td>7</td><td>11</td><td>11</td></tr>
<tr><td>BenchA: Init</td><td>ms</td><td>578</td><td>719</td><td>3328</td></tr>
<tr><td>BenchA: Transactions</td><td>ms</td><td>3047</td><td>2406</td><td>12907</td></tr>
<tr><td>BenchA: Memory Usage</td><td>MB</td><td>10</td><td>15</td><td>10</td></tr>
<tr><td>BenchB: Init</td><td>ms</td><td>2141</td><td>2406</td><td>11562</td></tr>
<tr><td>BenchB: Transactions</td><td>ms</td><td>1125</td><td>1375</td><td>3625</td></tr>
<tr><td>BenchB: Memory Usage</td><td>MB</td><td>9</td><td>11</td><td>8</td></tr>
<tr><td>BenchC: Init</td><td>ms</td><td>688</td><td>594</td><td>4500</td></tr>
<tr><td>BenchC: Transactions</td><td>ms</td><td>1906</td><td>64062</td><td>6047</td></tr>
<tr><td>BenchC: Memory Usage</td><td>MB</td><td>11</td><td>17</td><td>11</td></tr>
<tr><td>Executed statements</td><td>#</td><td>322929</td><td>322929</td><td>322929</td></tr>
<tr><td>Total time</td><td>ms</td><td>11485</td><td>74798</td><td>74031</td></tr>
<tr><td>Statements per second</td><td>#</td><td>28117</td><td>4317</td><td>4362</td></tr>
</table>
<h3>Client-Server</h3>
<table border="1" class="bar">
<tr><th>Test Case</th><th>Unit</th><th>H2</th><th>HSQLDB</th><th>Derby</th><th>PostgreSQL</th><th>MySQL</th></tr>
<tr><td>Simple: Init</td><td>ms</td><td>3125</td><td>3312</td><td>7140</td><td>5109</td><td>3594</td></tr>
<tr><td>Simple: Query (random)</td><td>ms</td><td>3390</td><td>3328</td><td>9953</td><td>5422</td><td>4812</td></tr>
<tr><td>Simple: Query (sequential)</td><td>ms</td><td>3235</td><td>3219</td><td>9813</td><td>5296</td><td>3969</td></tr>
<tr><td>Simple: Update (random)</td><td>ms</td><td>3437</td><td>4562</td><td>26594</td><td>6766</td><td>5703</td></tr>
<tr><td>Simple: Delete (sequential)</td><td>ms</td><td>1391</td><td>1625</td><td>9343</td><td>2750</td><td>2094</td></tr>
<tr><td>Simple: Memory Usage</td><td>MB</td><td>7</td><td>7</td><td>13</td><td>0</td><td>1</td></tr>
<tr><td>BenchA: Init</td><td>ms</td><td>2781</td><td>2954</td><td>7828</td><td>4875</td><td>3859</td></tr>
<tr><td>BenchA: Transactions</td><td>ms</td><td>13015</td><td>11718</td><td>30031</td><td>17672</td><td>13187</td></tr>
<tr><td>BenchA: Memory Usage</td><td>MB</td><td>9</td><td>17</td><td>10</td><td>1</td><td>1</td></tr>
<tr><td>BenchB: Init</td><td>ms</td><td>12000</td><td>13047</td><td>30562</td><td>20687</td><td>15328</td></tr>
<tr><td>BenchB: Transactions</td><td>ms</td><td>5375</td><td>3688</td><td>8063</td><td>6250</td><td>4594</td></tr>
<tr><td>BenchB: Memory Usage</td><td>MB</td><td>10</td><td>12</td><td>8</td><td>1</td><td>1</td></tr>
<tr><td>BenchC: Init</td><td>ms</td><td>2390</td><td>1875</td><td>7015</td><td>2515</td><td>4062</td></tr>
<tr><td>BenchC: Transactions</td><td>ms</td><td>11391</td><td>77922</td><td>23766</td><td>13203</td><td>8141</td></tr>
<tr><td>BenchC: Memory Usage</td><td>MB</td><td>11</td><td>18</td><td>15</td><td>1</td><td>1</td></tr>
<tr><td>Executed statements</td><td>#</td><td>594255</td><td>594255</td><td>594255</td><td>594255</td><td>594255</td></tr>
<tr><td>Total time</td><td>ms</td><td>61530</td><td>127250</td><td>170108</td><td>90545</td><td>69343</td></tr>
<tr><td>Statements per second</td><td>#</td><td>9657</td><td>4669</td><td>3493</td><td>6563</td><td>8569</td></tr>
<tr><td>Simple: Init</td><td>ms</td><td>2782</td><td>2656</td><td>5625</td><td>4563</td><td>3484</td></tr>
<tr><td>Simple: Query (random)</td><td>ms</td><td>3093</td><td>2703</td><td>6688</td><td>4812</td><td>3860</td></tr>
<tr><td>Simple: Query (sequential)</td><td>ms</td><td>2969</td><td>2594</td><td>6437</td><td>4719</td><td>3625</td></tr>
<tr><td>Simple: Update (random)</td><td>ms</td><td>2969</td><td>3531</td><td>18250</td><td>5953</td><td>5125</td></tr>
<tr><td>Simple: Delete (sequential)</td><td>ms</td><td>1047</td><td>1250</td><td>6875</td><td>2485</td><td>2390</td></tr>
<tr><td>Simple: Memory Usage</td><td>MB</td><td>7</td><td>11</td><td>14</td><td>0</td><td>0</td></tr>
<tr><td>BenchA: Init</td><td>ms</td><td>2250</td><td>2453</td><td>6031</td><td>4328</td><td>3625</td></tr>
<tr><td>BenchA: Transactions</td><td>ms</td><td>10250</td><td>9016</td><td>21484</td><td>15609</td><td>11172</td></tr>
<tr><td>BenchA: Memory Usage</td><td>MB</td><td>10</td><td>15</td><td>10</td><td>0</td><td>1</td></tr>
<tr><td>BenchB: Init</td><td>ms</td><td>9500</td><td>10672</td><td>22609</td><td>19609</td><td>13406</td></tr>
<tr><td>BenchB: Transactions</td><td>ms</td><td>2734</td><td>2656</td><td>3875</td><td>4688</td><td>2531</td></tr>
<tr><td>BenchB: Memory Usage</td><td>MB</td><td>10</td><td>11</td><td>11</td><td>1</td><td>1</td></tr>
<tr><td>BenchC: Init</td><td>ms</td><td>1860</td><td>1484</td><td>6890</td><td>2219</td><td>3438</td></tr>
<tr><td>BenchC: Transactions</td><td>ms</td><td>9046</td><td>63266</td><td>18641</td><td>11703</td><td>7421</td></tr>
<tr><td>BenchC: Memory Usage</td><td>MB</td><td>12</td><td>17</td><td>13</td><td>0</td><td>1</td></tr>
<tr><td>Executed statements</td><td>#</td><td>322929</td><td>322929</td><td>322929</td><td>322929</td><td>322929</td></tr>
<tr><td>Total time</td><td>ms</td><td>48500</td><td>102281</td><td>123405</td><td>80688</td><td>60077</td></tr>
<tr><td>Statements per second</td><td>#</td><td>6658</td><td>3157</td><td>2616</td><td>4002</td><td>5375</td></tr>
</table>
<h3>Benchmark Results and Comments</h3>
<h4>H2</h4>
<p>
Version 1.0.78 (2008-08-28) was used for the test.
Version 1.1.114 (2009-06-01) was used for the test.
For simpler operations, the performance of H2 is about the same as for HSQLDB.
For more complex queries, the query optimizer is very important.
However H2 is not very fast in every case, certain kind of queries may still be slow.
......@@ -132,7 +132,7 @@ than half as fast as H2 in default mode.
<h4>PostgreSQL</h4>
<p>
Version 8.3.4 was used for the test.
Version 8.3.7 was used for the test.
The following options where changed in postgresql.conf:
fsync = off, commit_delay = 1000.
PostgreSQL is run in server mode. It looks like the base performance is slower than
......@@ -142,7 +142,7 @@ The memory usage number is incorrect, because only the memory usage of the JDBC
<h4>MySQL</h4>
<p>
Version 5.0.67 was used for the test.
Version 5.1.34-community was used for the test.
MySQL was run with the InnoDB backend.
The setting innodb_flush_log_at_trx_commit
(found in the my.ini file) was set to 0. Otherwise (and by default), MySQL is really slow
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h2/src/docsrc/text/_docs_en.utf8.txt
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h2/src/main/org/h2/res/javadoc.properties
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org.h2.tools.Backup=Creates a backup of a database.
org.h2.tools.Backup.main=Options are case sensitive. Supported options are\:\n[-help] or [-?] Print the list of options\n[-file <filename>] The target file name (default\: backup.zip)\n[-dir <dir>] The source directory (default\: .)\n[-db <database>] Source database; not required if there is only one\n[-quiet] Do not print progress information
org.h2.tools.ChangeFileEncryption=Allows changing the database file encryption password or algorithm.\nThis tool can not be used to change a password of a user.
org.h2.tools.ChangeFileEncryption.main=Options are case sensitive. Supported options are\:\n[-help] or [-?] Print the list of options\n[-cipher type] The encryption type (AES or XTEA)\n[-dir <dir>] The database directory (default\: .)\n[-db <database>] Database name (all databases if not set)\n[-decrypt <pwd>] The decryption password (if not set\: not yet encrypted)\n[-encrypt <pwd>] The encryption password (if not set\: do not encrypt)\n[-quiet] Do not print progress information
org.h2.tools.Console=Starts the H2 Console (web-) server, as well as the TCP and PG server.
org.h2.tools.Console.main=When running without options, -tcp, -web, -browser and -pg are started.\nOptions are case sensitive. Supported options are\:\n[-help] or [-?] Print the list of options\n[-web] Start the web server with the H2 Console\n[-tool] Start the icon or window that allows to start a browser\n[-browser] Start a browser and open a page to connect to the web server\n[-tcp] Start the TCP server\n[-pg] Start the PG server\nFor each Server, additional options are available;\n for details, see the Server tool.\nIf a service can not be started, the program\n terminates with an exit code of 1.
org.h2.tools.ConvertTraceFile=Converts a .trace.db file to a SQL script and Java source code.\nSQL statement statistics are listed as well.
org.h2.tools.ConvertTraceFile.main=Options are case sensitive. Supported options are\:\n[-help] or [-?] Print the list of options\n[-traceFile <file>] The trace file name (default\: test.trace.db)\n[-script <file>] The script file name (default\: test.sql)\n[-javaClass <file>] The Java directory and class file name (default\: Test)
org.h2.tools.CreateCluster=Creates a cluster from a standalone database.\nCopies a database to another location if required.
org.h2.tools.CreateCluster.main=Options are case sensitive. Supported options are\:\n[-help] or [-?] Print the list of options\n[-urlSource <url>] The database URL of the source database (jdbc\:h2\:...)\n[-urlTarget <url>] The database URL of the target database (jdbc\:h2\:...)\n[-user <user>] The user name (default\: sa)\n[-password <pwd>] The password\n[-serverList <list>] The comma separated list of host names or IP addresses
org.h2.tools.DeleteDbFiles=Deletes all files belonging to a database.\nThe database must be closed before calling this tool.
org.h2.tools.DeleteDbFiles.main=Options are case sensitive. Supported options are\:\n[-help] or [-?] Print the list of options\n[-dir <dir>] The directory (default\: .)\n[-db <database>] The database name\n[-quiet] Do not print progress information
org.h2.tools.Recover=Helps recovering a corrupted database.
org.h2.tools.Recover.main=Options are case sensitive. Supported options are\:\n[-help] or [-?] Print the list of options\n[-dir <dir>] The directory (default\: .)\n[-db <database>] The database name (all databases if not set)\n[-trace] Print additional trace information
org.h2.tools.Restore=Restores a H2 database by extracting the database files from a .zip file.
org.h2.tools.Restore.main=Options are case sensitive. Supported options are\:\n[-help] or [-?] Print the list of options\n[-file <filename>] The source file name (default\: backup.zip)\n[-dir <dir>] The target directory (default\: .)\n[-db <database>] The target database name (as stored if not set)\n[-quiet] Do not print progress information
org.h2.tools.RunScript=Runs a SQL script against a database.
org.h2.tools.RunScript.main=Options are case sensitive. Supported options are\:\n[-help] or [-?] Print the list of options\n[-url <url>] The database URL (jdbc\:...)\n[-user <user>] The user name (default\: sa)\n[-password <pwd>] The password\n[-script <file>] The script file to run (default\: backup.sql)\n[-driver <class>] The JDBC driver class to use (not required in most cases)\n[-showResults] Show the statements and the results of queries\n[-checkResults] Check if the query results match the expected results\n[-options ...] RUNSCRIPT options (embedded H2; -*Results not supported)
org.h2.tools.Script=Creates a SQL script file by extracting the schema and data of a database.
org.h2.tools.Script.main=Options are case sensitive. Supported options are\:\n[-help] or [-?] Print the list of options\n[-url <url>] The database URL (jdbc\:...)\n[-user <user>] The user name (default\: sa)\n[-password <pwd>] The password\n[-script <file>] The target script file name (default\: backup.sql)\n[-options ...] A list of options (only for embedded H2, see RUNSCRIPT)\n[-quiet] Do not print progress information
org.h2.tools.Server=Starts the H2 Console (web-) server, TCP, and PG server.
org.h2.tools.Server.main=When running without options, -tcp, -web, -browser and -pg are started.\nOptions are case sensitive. Supported options are\:\n[-help] or [-?] Print the list of options\n[-web] Start the web server with the H2 Console\n[-webAllowOthers] Allow other computers to connect\n[-webPort <port>] The port (default\: 8082)\n[-webSSL] Use encrypted (HTTPS) connections\n[-browser] Start a browser and open a page to connect to the web server\n[-tcp] Start the TCP server\n[-tcpAllowOthers] Allow other computers to connect\n[-tcpPort <port>] The port (default\: 9092)\n[-tcpSSL] Use encrypted (SSL) connections\n[-tcpPassword <pwd>] The password for shutting down a TCP server\n[-tcpShutdown <url>] Stop the TCP server; example\: tcp\://localhost\:9094\n[-tcpShutdownForce] Do not wait until all connections are closed\n[-pg] Start the PG server\n[-pgAllowOthers] Allow other computers to connect\n[-pgPort <port>] The port (default\: 5435)\n[-baseDir <dir>] The base directory for H2 databases; for all servers\n[-ifExists] Only existing databases may be opened; for all servers\n[-trace] Print additional trace information; for all servers
org.h2.tools.Shell=Interactive command line tool to access a database using JDBC.
org.h2.tools.Shell.main=Options are case sensitive. Supported options are\:\n[-help] or [-?] Print the list of options\n[-url <url>] The database URL (jdbc\:h2\:...)\n[-user <user>] The user name\n[-password <pwd>] The password\n[-driver <class>] The JDBC driver class to use (not required in most cases)
org.h2.tools.Backup=Creates a backup of a database.
org.h2.tools.Backup.main=Options are case sensitive. Supported options are\:\n[-help] or [-?] Print the list of options\n[-file <filename>] The target file name (default\: backup.zip)\n[-dir <dir>] The source directory (default\: .)\n[-db <database>] Source database; not required if there is only one\n[-quiet] Do not print progress information
org.h2.tools.ChangeFileEncryption=Allows changing the database file encryption password or algorithm.\nThis tool can not be used to change a password of a user.
org.h2.tools.ChangeFileEncryption.main=Options are case sensitive. Supported options are\:\n[-help] or [-?] Print the list of options\n[-cipher type] The encryption type (AES or XTEA)\n[-dir <dir>] The database directory (default\: .)\n[-db <database>] Database name (all databases if not set)\n[-decrypt <pwd>] The decryption password (if not set\: not yet encrypted)\n[-encrypt <pwd>] The encryption password (if not set\: do not encrypt)\n[-quiet] Do not print progress information
org.h2.tools.Console=Starts the H2 Console (web-) server, as well as the TCP and PG server.
org.h2.tools.Console.main=When running without options, -tcp, -web, -browser and -pg are started.\nOptions are case sensitive. Supported options are\:\n[-help] or [-?] Print the list of options\n[-web] Start the web server with the H2 Console\n[-tool] Start the icon or window that allows to start a browser\n[-browser] Start a browser and open a page to connect to the web server\n[-tcp] Start the TCP server\n[-pg] Start the PG server\nFor each Server, additional options are available;\n for details, see the Server tool.\nIf a service can not be started, the program\n terminates with an exit code of 1.
org.h2.tools.ConvertTraceFile=Converts a .trace.db file to a SQL script and Java source code.\nSQL statement statistics are listed as well.
org.h2.tools.ConvertTraceFile.main=Options are case sensitive. Supported options are\:\n[-help] or [-?] Print the list of options\n[-traceFile <file>] The trace file name (default\: test.trace.db)\n[-script <file>] The script file name (default\: test.sql)\n[-javaClass <file>] The Java directory and class file name (default\: Test)
org.h2.tools.CreateCluster=Creates a cluster from a standalone database.\nCopies a database to another location if required.
org.h2.tools.CreateCluster.main=Options are case sensitive. Supported options are\:\n[-help] or [-?] Print the list of options\n[-urlSource <url>] The database URL of the source database (jdbc\:h2\:...)\n[-urlTarget <url>] The database URL of the target database (jdbc\:h2\:...)\n[-user <user>] The user name (default\: sa)\n[-password <pwd>] The password\n[-serverList <list>] The comma separated list of host names or IP addresses
org.h2.tools.DeleteDbFiles=Deletes all files belonging to a database.\nThe database must be closed before calling this tool.
org.h2.tools.DeleteDbFiles.main=Options are case sensitive. Supported options are\:\n[-help] or [-?] Print the list of options\n[-dir <dir>] The directory (default\: .)\n[-db <database>] The database name\n[-quiet] Do not print progress information
org.h2.tools.Recover=Helps recovering a corrupted database.
org.h2.tools.Recover.main=Options are case sensitive. Supported options are\:\n[-help] or [-?] Print the list of options\n[-dir <dir>] The directory (default\: .)\n[-db <database>] The database name (all databases if not set)\n[-trace] Print additional trace information
org.h2.tools.Restore=Restores a H2 database by extracting the database files from a .zip file.
org.h2.tools.Restore.main=Options are case sensitive. Supported options are\:\n[-help] or [-?] Print the list of options\n[-file <filename>] The source file name (default\: backup.zip)\n[-dir <dir>] The target directory (default\: .)\n[-db <database>] The target database name (as stored if not set)\n[-quiet] Do not print progress information
org.h2.tools.RunScript=Runs a SQL script against a database.
org.h2.tools.RunScript.main=Options are case sensitive. Supported options are\:\n[-help] or [-?] Print the list of options\n[-url <url>] The database URL (jdbc\:...)\n[-user <user>] The user name (default\: sa)\n[-password <pwd>] The password\n[-script <file>] The script file to run (default\: backup.sql)\n[-driver <class>] The JDBC driver class to use (not required in most cases)\n[-showResults] Show the statements and the results of queries\n[-checkResults] Check if the query results match the expected results\n[-options ...] RUNSCRIPT options (embedded H2; -*Results not supported)
org.h2.tools.Script=Creates a SQL script file by extracting the schema and data of a database.
org.h2.tools.Script.main=Options are case sensitive. Supported options are\:\n[-help] or [-?] Print the list of options\n[-url <url>] The database URL (jdbc\:...)\n[-user <user>] The user name (default\: sa)\n[-password <pwd>] The password\n[-script <file>] The target script file name (default\: backup.sql)\n[-options ...] A list of options (only for embedded H2, see RUNSCRIPT)\n[-quiet] Do not print progress information
org.h2.tools.Server=Starts the H2 Console (web-) server, TCP, and PG server.
org.h2.tools.Server.main=When running without options, -tcp, -web, -browser and -pg are started.\nOptions are case sensitive. Supported options are\:\n[-help] or [-?] Print the list of options\n[-web] Start the web server with the H2 Console\n[-webAllowOthers] Allow other computers to connect\n[-webPort <port>] The port (default\: 8082)\n[-webSSL] Use encrypted (HTTPS) connections\n[-browser] Start a browser and open a page to connect to the web server\n[-tcp] Start the TCP server\n[-tcpAllowOthers] Allow other computers to connect\n[-tcpPort <port>] The port (default\: 9092)\n[-tcpSSL] Use encrypted (SSL) connections\n[-tcpPassword <pwd>] The password for shutting down a TCP server\n[-tcpShutdown <url>] Stop the TCP server; example\: tcp\://localhost\:9094\n[-tcpShutdownForce] Do not wait until all connections are closed\n[-pg] Start the PG server\n[-pgAllowOthers] Allow other computers to connect\n[-pgPort <port>] The port (default\: 5435)\n[-baseDir <dir>] The base directory for H2 databases; for all servers\n[-ifExists] Only existing databases may be opened; for all servers\n[-trace] Print additional trace information; for all servers
org.h2.tools.Shell=Interactive command line tool to access a database using JDBC.
org.h2.tools.Shell.main=Options are case sensitive. Supported options are\:\n[-help] or [-?] Print the list of options\n[-url <url>] The database URL (jdbc\:h2\:...)\n[-user <user>] The user name\n[-password <pwd>] The password\n[-driver <class>] The JDBC driver class to use (not required in most cases)
h2/src/test/org/h2/test/bench/test.properties
浏览文件 @ b34ed604
......@@ -9,7 +9,7 @@ db1 = H2, org.h2.Driver, jdbc:h2:data/test;LOCK_TIMEOUT=10000;LOCK_MODE=3, sa, s
#xdb5 = H2_PG, org.postgresql.Driver, jdbc:postgresql://localhost:5435/h2test, sa, sa
db2 = HSQLDB, org.hsqldb.jdbcDriver, jdbc:hsqldb:data/test;hsqldb.default_table_type=cached;sql.enforce_size=true, sa
db3 = Derby, org.apacheT.derby.jdbc.EmbeddedDriver, jdbc:derby:data/derby;create=true, sa, sa
db3 = Derby, org.apache.derby.jdbc.EmbeddedDriver, jdbc:derby:data/derby;create=true, sa, sa
db4 = H2, org.h2.Driver, jdbc:h2:tcp://localhost/data/testServer;LOCK_TIMEOUT=10000;LOCK_MODE=3, sa, sa
db5 = HSQLDB, org.hsqldb.jdbcDriver, jdbc:hsqldb:hsql://localhost/xdb, sa
......
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