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What’s New in Oracle Database 12c for PHP
 

What’s New in Oracle Database 12c for PHP

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If you use scripting languages to power web, mobile, and/or enterprise applications, this session will show you how to use Oracle Database efficiently. It demonstrates how PHP can take full advantage ...

If you use scripting languages to power web, mobile, and/or enterprise applications, this session will show you how to use Oracle Database efficiently. It demonstrates how PHP can take full advantage of new performance, scalability, availability, and security features in Oracle Database 12c and Oracle Linux. Many of these features are available to other C-based scripting languages too, like Ruby, Python and Perl. DBA's will also benefit by seeing how applications can be monitored.

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    What’s New in Oracle Database 12c for PHP What’s New in Oracle Database 12c for PHP Presentation Transcript

    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.1
    • What’s New in Oracle Database 12c for Scripting Languages Christopher Jones, Oracle Shoaib Lari, Oracle September 2013
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.3 The following is intended to outline our general product direction. It is intended for information purposes only, and may not be incorporated into any contract. It is not a commitment to deliver any material, code, or functionality, and should not be relied upon in making purchasing decisions. The development, release, and timing of any features or functionality described for Oracle’s products remains at the sole discretion of Oracle.
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.4 Program Agenda  Three-slide Introduction to PHP OCI8  Useful Oracle Database 12c Features  PHP DTrace for Dynamic Tracing  Oracle/MySQL PHP Applications  PHP Performance and Scalability
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.5 Three-slide Introduction to PHP OCI8
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.6 Traditional PHP Script Processing
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.7 One of Many Modern PHP Architectures PHP Update QueueCache Apache PHP OCI8 Extension Oracle Libraries PHP Web Service DB
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.8 What is PHP OCI8?  Recommended Oracle Database extension for PHP  Supports many Oracle features  Available in PHP C source and binary bundles  PHP OCI8 2.0 "Development" is on http://pecl.php.net $c = oci_connect('scott', 'tiger', 'localhost/pdborcl'); $s = oci_parse($c, 'SELECT * FROM employees'); oci_execute($s); while (($row = oci_fetch_row($s)) != false)‫‏‬ foreach ($row as $item)‫‏‬ print $item;
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.9 Program Agenda  Three-slide Introduction to PHP OCI8  Useful Oracle Database 12c Features  PHP DTrace for Dynamic Tracing  Oracle/MySQL PHP Applications  PHP Performance and Scalability
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.10 Useful Oracle Database 12c Features
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.11 32K VARCHARs in Oracle Database 12c  SQL CREATE TABLE vctab (vcdata VARCHAR2(32767));  PHP OCI8 does insert and fetch in one piece $s = oci_parse($c, "INSERT INTO vctab (vcdata) VALUES (:bv)"); $bv = str_repeat('x', 32767); oci_bind_by_name($s, ":bv", $bv); oci_execute($s);
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.12 32K VARCHARs in Oracle Database 12c  CLOB vs VARCHAR2 $s = oci_parse($c, 'SELECT clobdata FROM ctab'); oci_execute($s); $row = oci_fetch_assoc($s); $result = $row['CLOBDATA']->load();  32K fetch times (very dependent on LOB storage, network speeds etc) CLOB: 0.574 seconds VARCHAR2: 0.279 seconds $s = oci_parse($c, 'SELECT vcdata FROM vctab'); oci_execute($s); $row = oci_fetch_assoc($s); $result = $row['VCDATA'];
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.13 Oracle DB 12c SQL Row Limiting Clause $sql = "SELECT employee_id, last_name FROM employees ORDER BY employee_id"; if ($oracleversion >= 12) { $sql = $sql . ' OFFSET :offset ROWS FETCH NEXT :maxnumrows ROWS ONLY'; } else { $sql = "SELECT * FROM (SELECT A.*, ROWNUM AS MY_RNUM FROM ($sql) A WHERE ROWNUM <= :maxnumrows + :offset) WHERE MY_RNUM > :offset"; } $offset = 5; $maxnumrows = 5; $s = oci_parse($c, $sql); oci_bind_by_name($s, ":offset", $offset, -1, SQLT_INT); oci_bind_by_name($s, ":maxnumrows", $maxnumrows, -1, SQLT_INT); oci_execute($s); oci_fetch_all($s, $res); 105 Austin 106 Pataballa 107 Lorentz 108 Greenberg 109 Faviet Or use row_number()
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.14 Oracle DB 12c IDENTITY Columns  ANSI auto increment syntax: CREATE TABLE t1 (c1 NUMBER GENERATED BY DEFAULT ON NULL AS IDENTITY, c2 VARCHAR2(20));  In PHP: $s = oci_parse($c, "INSERT INTO t1 (c2) VALUES ('Alison')"); oci_execute($s); $s = oci_parse($c, "INSERT INTO t1 (c1, c2) VALUES (NULL, 'Chris')"); oci_execute($s);  Table now contains: 1 Chris 2 Alison
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.15 Oracle DB 12c OCI oraaccess.xml Deployment Settings  New $TNS_ADMIN/oraaccess.xml deployment settings file  Client (i.e. PHP) side file for configuring OCI-based driver settings  Global and per-connection string parameters  Don't need to modify application to improve performance  Restart application after editing
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.16 Row Prefetching Refresher Temporary buffer cache for query duration // First Fetch $r = oci_fetch_row(…); var_dump($r); // array('1000','Roma'); OCI8 Extension Oracle Libraries 1000, Roma 1100, Venice 1200, Tokyo . . . 1000, Roma // Second Fetch $r = oci_fetch_row(…); var_dump($r); // array('1100','Venice'); OCI8 Extension Oracle Libraries 1000, Roma 1100, Venice 1200, Tokyo . . . 1100, Venice No DB access for second fetch X
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.17 oraaccess.xml Prefetch Tuning  PHP code needing tuning: $s = oci_parse($c, "SELECT ..."); oci_execute($s); oci_set_prefetch($s, 1); // application sets prefetch while (($row = oci_fetch_row($s)) != false) var_dump($row);  $TNS_ADMIN/oraaccess.xml snippet: <prefetch> <rows>1000</rows> </prefetch
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.18 oraaccess.xml Prefetch Tuning  Pre-12c: Fetching 20000 rows with application prefetch 1 Time is: 5.822 seconds  With Oracle Database 12c $TNS_ADMIN/oraaccess.xml: Fetching 20000 rows with application prefetch 1 Time is: 0.863 seconds (Very dependent on network speeds etc)  See exhibition booth demo
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.19 Statement Caching Refresher oci8.statement_cache_size = 20 1. “select col from tab”, <metadata> 2. … 20. 1. “select col from tab” 2. … statement 1 select col from tab select col from tab select col from tab
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.20 oraaccess.xml Auto-tuning Statement Cache  Statement cache size monitored & updated in a cycle – Cache size increases/decreases gradually  ram_threshold is max percentage of installed RAM  memory_target is absolute max size  Lesser of these two is used as the limit. <auto_tune> <enable>true</enable> <ram_threshold>0.1</ram_threshold> <memory_target>2M</memory_target> </auto_tune>
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.21 oraaccess.xml Auto-tuning Statement Cache for ($j = 0; $j < 10; ++$j) { echo "Running workloadn"; for ($i = 0; $i < 30; ++$i) do_query($c1, "SELECT $i FROM dual"); // 30 distinct queries echo "Number of new parses for this session: ", print_new_parse_count(), "n"; }  PHP OCI8 default: oci8.statement_cache_size = 20 – So 30 sequential statements are never effectively cached
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.22 oraaccess.xml Auto-tuning Statement Cache  Pre-12c ... Running workload Number of new parses for this session: 30 Running workload Number of new parses for this session: 30 ...  Tune by manually monitoring web server performance, AWR byte transfers, reset oci8.statement_cache_size
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.23 oraaccess.xml Auto-tuning Statement Cache  Auto-tuned with Oracle Database 12c $TNS_ADMIN/oraaccess.xml: ... Running workload Number of new parses for this session: 30 Running workload Number of new parses for this session: 0 Running workload Number of new parses for this session: 0 ...  See exhibition booth demo
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.24 Implicit Result Sets in PHP $sql = "DECLARE c1 SYS_REFCURSOR; BEGIN OPEN c1 FOR SELECT city, postal_code FROM locations; DBMS_SQL.RETURN_RESULT(c1); OPEN c1 FOR SELECT * FROM employees; DBMS_SQL.RETURN_RESULT(c1); END;";  Needs PHP OCI8 2.0-devel from PECL  From 10gR2 – With Oracle Database 12c client and 12c server now uses ONS
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.25 Implicit Result Sets in PHP  Use standard query code: $s = oci_parse($c, $sql); oci_execute($s); while (($row = oci_fetch_row($s)) != false) { foreach ($row as $item) echo $item . " "; echo "n"; } Roma 00989 Venice 10934 ... Mexico City 11932 100 Steven King SKING 101 Neena Kochhar NKOCHHAR ... BEGIN OPEN c1 FOR SELECT city, postal_code FROM locations; DBMS_SQL.RETURN_RESULT(c1); OPEN c1 FOR SELECT * FROM employees; DBMS_SQL.RETURN_RESULT(c1); END;
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.26 Implicit Result Sets in PHP Example #2  Use oci_get_implicit_resultset() function in PHP OCI8 2.0 $s = oci_parse($c, $sql); oci_execute($s); while (($s_2 = oci_get_implicit_resultset($s))) { for ($i = 1; $i <= oci_num_fields($s_2); ++$i) echo oci_field_name($s_2, $i) . " "; // Use column names for headings echo "n"; while (($row = oci_fetch_row($s_2)) != false) { foreach ($row as $item) echo $item . " "; echo "n"; } } CITY POSTAL_CODE Roma 00989 Venice 10934 ... EMPLOYEE_ID FIRST_NAME LAST_NAME EMAIL 100 Steven King SKING 101 Neena Kochhar NKOCHHAR ...
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.27 Program Agenda  Three-slide Introduction to PHP OCI8  Useful Oracle Database 12c Features  PHP DTrace for Dynamic Tracing  Oracle/MySQL PHP Applications  PHP Performance and Scalability
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.28 PHP DTrace for Dynamic Tracing on Oracle Linux
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.29 Dynamic Tracing Overview  Dynamic Tracing from Solaris ported to Oracle Linux's UEK3 kernel "DTrace is a facility for the dynamic instrumentation of production systems, for the purpose of troubleshooting and analysis."  DTrace User Space Dynamic Tracing (USDT) now available  PHP source code is instrumented with “probes” if (DTRACE_OCI8_ERROR_ENABLED()) { DTRACE_OCI8_ERROR((int)errstatus, (long)errcode); }  PHP 5.4.20 & 5.5.4 –-enable-dtrace linking stabilized
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.30 DTrace User Space Dynamic Tracing (USDT)  Install Oracle Linux with UEK3 kernel and dtrace-utils http://public-yum.oracle.com/beta/  For PHP, enable DTrace User Space Dynamic Tracing (USDT) # modprobe fasttrap # chmod 666 /dev/dtrace/helper  Build PHP 5.4.20 or PHP 5.5.4 and install PHP OCI8 2.0 as a shared library from PECL # ./configure --enable-dtrace ... # make && make install # PHP_DTRACE=yes pecl install oci8-devel
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.31 DTrace User Space Dynamic Tracing (USDT)  Show probes available in PHP OCI8: # dtrace -l -m oci8.so ... 18 php9559 oci8.so php_oci_do_connect oci8-connect-entry 23 php9559 oci8.so php_oci_do_connect oci8-connect-return 24 php9559 oci8.so php_oci_do_connect_ex oci8-connect-type 25 php9559 oci8.so php_oci_error oci8-error 26 php9559 oci8.so php_oci_statement_execute oci8-execute-mode ...
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.32 DTrace User Space Dynamic Tracing (USDT)  Write tracing scripts in D, e.g. trace.d: #!/usr/sbin/dtrace -Zqs php*:::oci8-connect-entry { printf("%lld: PHP connect-entryn", walltimestamp); printf("t credentials %s@%sn“,‫‏‏‬arg0 ? copyinstr(arg0) : "", arg1 ? copyinstr(arg1) : ""); printf("t charset %sn", arg2 ? copyinstr(arg2) : ""); printf("t session_mode %ld : n", (long)arg3); printf("persistent %d : ", (int)arg4); printf("exclusive %dn", (int)arg5); } ...
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.33 DTrace User Space Dynamic Tracing (USDT)  Run trace.d # ./trace.d  Run a PHP script $ php oci8.php Beijing Bern Bombay Geneva
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.34 DTrace User Space Dynamic Tracing (USDT) # ./trace.d 1379702722173349580: PHP connect-entry credentials cj@localhost/pdborcl charset session_mode 0 : persistent 0 : exclusive 1 1379702722258590635: PHP oci8-connect-return connection 0x7fccdc1c2828 1379702722259141543: PHP oci8-sqltext connection 0x7fccdc1c2828 sql select city from locations where rownum < 5 order by 1 1379702722259240438: PHP oci8-execute-mode connection 0x7fccdc1c2828 mode 0x20
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.35 Program Agenda  Three-slide Introduction to PHP OCI8  Useful Oracle Database 12c Features  PHP DTrace for Dynamic Tracing  Oracle/MySQL PHP Applications  PHP Performance and Scalability
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.36 Oracle/MySQL PHP Applications
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.37 Oracle Database Driver for MySQL Applications  Deployment Process: – Migrate Schema and Data – Build Application with the Driver – Translate SQL – Test and Tune to Leverage Oracle Database Features libmysqlclient MySQL DB Oracle DB liboramysql OCI Application using MySQL’s C API Application using MySQL’s C API
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.38 Build Application with the Driver  One method of re-linking with the new 12c Driver: – Build PHP mysql extension(s) with MySQL Connector/C # ./configure --with-mysql=/usr ... # make && make install – Create a symlink to the Oracle driver library: # ln –s $ORACLE_HOME/lib/liboramysql12.so $ORACLE_HOME/lib/libmysql.so # export LD_LIBRARY_PATH=$ORACLE_HOME/lib
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.39 Build Application with the Driver  Another method of re-linking with the new 12c Driver: – Use a Connector/C emulator: # cd $HOME # $INSTANTCLIENTDIR/sdk/demo/setuporamysql.sql # ./configure --with-mysql=$HOME/oramysql ... # make && make installs (Other methods exist too)  Restart PHP # service httpd start
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.40 Translate SQL  Change connect string: mysql_connect("localhost/pdborcl", "scott", "tiger");  Change SQL manually or use an Oracle Database 12c SQL Translation Profile: – MySQL syntax: $sql = "SELECT * FROM mytab LIMIT 5,10"; – Oracle ANSI syntax: $sql = "SELECT * FROM mytab OFFSET 5 ROWS FETCH NEXT 10 ROWS ONLY";  Run the Application
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.41 Program Agenda  Three-slide Introduction to PHP OCI8  Useful Oracle Database 12c Features  PHP DTrace for Dynamic Tracing  Oracle/MySQL PHP Applications  PHP Performance and Scalability
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.42 PHP Performance and Scalability
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.43 Scaling up with DRCP Connection Pooling 5000 users, DRCP pool size of 100 Dedicated Server Processes 5000 x 4 MB + 5000 x 400 KB + 0 = 21 GB DB Processes Session Memory DRCP Broker Total 100 x 4 MB + 100 x 400 KB + 5000 x 35 KB = 610 MB PHP DB PHP DB DRCP Server Processes
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.44 DRCP Connection Pooling  Use DRCP for short lived connections by same DB user  Using DRCP in PHP 5.3+ with Oracle 11g+: – Start the Pool: SQL> EXECUTE DBMS_CONNECTION_POOL.START_POOL(); – Set oci8.connection_class in php.ini oci8.connection_class = MY_PHP_APP – Add "POOLED" to the connect string: $c = oci_pconnect('scott', 'tiger', 'myhost/sales:pooled');
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.45 DRCP Connection Pooling Benchmark  2GB RAM  1 connection broker  100 pooled servers
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.46 Client Identifiers for Auditing and Monitoring  Set client identifier in PHP after connection session_start(); $c = oci_pconnect('phpuser', 'welcome', 'localhost/orcl'); if (authenticate_web_user()) { oci_set_client_identifier($c, $_SESSION['app_user_name']); // e.g. 'Chris' . . . } else { trigger_error(. . .); }
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.47 Client Identifiers for Auditing APP_USERNAME USERNAME EXTENDED_TIMESTAMP ACTION_NAME ------------- ----------- ----------------------------------- ----------- Chris PHPUSER 16-AUG-13 12.25.42.846153 PM -07:00 SELECT Alison PHPUSER 16-AUG-13 12.25.50.870773 PM -07:00 SELECT Details in an OTN article
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.49 Client Identifiers for Monitoring  Client Identifier is visible in views and in Enterprise Manager
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.53 Oracle Client and Server Result Caches CREATE TABLE SALES (...) RESULT_CACHE;  Results of queries from small tables can be cached  Caches automatically invalidated by server data changes – If no roundtrip within defined time, cache is assumed stale  Configure globally in DB or at client in sqlnet.ora – CLIENT_RESULT_CACHE_SIZE or OCI_RESULT_CACHE_MAX_SIZE
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.54 Other Oracle DB Features for High Performance Applications  Bind Variables  Transactions – don’t auto commit unnecessarily  Advanced Queuing – Move slower processing out of HTTP request/response cycle  Fast Application Notification – Handle DB errors without timeouts – Improves reconnection behavior – Needs Oracle DB 12c client libraries for Oracle DB 12c
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.55 Other Oracle DB Features for High Performance Applications  Edition Based Redefinition – Online PL/SQL Upgrades – Useful for A/B testing  Continuous Query Notification – Can use for cache invalidation  DBMS_XA – Stop/restart transaction in different HTTP requests
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.56 Resources
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.57 Resources http://blogs.oracle.com/opal: Blog, e.g. Implicit Result Sets, DTrace http://www.oracle.com/technetwork/topics/php: OTN PHP Dev Center http://tinyurl.com/phporacle: The Underground PHP & Oracle Manual http://tinyurl.com/drcpphp: DRCP Connection Pooling Whitepaper http://tinyurl.com/phpaudit: PHP Web Auditing, Authorization and Monitoring with Oracle Database  Demo Pod SL-033 (back left of Moscone South)  “Application Performance, Scalability, and Availability with Oracle Database 12c” (CON8855) 5:15pm Marriott Marquis - Golden Gate B  Email: christopher.jones@oracle.com Twitter: @ghrd
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.58
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.59
    • Copyright © 2013, Oracle and/or its affiliates. All rights reserved.60 The preceding is intended to outline our general product direction. It is intended for information purposes only, and may not be incorporated into any contract. It is not a commitment to deliver any material, code, or functionality, and should not be relied upon in making purchasing decisions. The development, release, and timing of any features or functionality described for Oracle’s products remains at the sole discretion of Oracle.