8/2/2019 Pre Compilation of JSP Pages to Improve Performance [ID
218281.1]
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Precompilation of JSP pages to improve performance [ID
218281.1]
Modified08-OCT-2008 Type TROUBLESHOOTING Status PUBLISHED
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PURPOSE-------The purpose of this note if to improve the
response time for JSP pages whenaccessed the first time by
users.
SCOPE / APPLICATION
-------------------
Intended for people maintaining Oracle Applications
PRECOMPILATION OF JSP PAGES-----------------------------Calling
a JSP page for the first time requires compile action before
theresult is send back to the browser.The compilation is done once
and the results of the compilation is storedin the
$COMMON_TOP/html/_pages directory which is used for future
accessesto the the JSP page.
Typical situations when cached JSP pages are not available:-
Environment is newly installed- Patches providing new JSP pages
require cached information in _pages tobe deleted
Although the compilation is done automatically it often leads to
slowresponse times for the users. The rootcause for this is that
compilation isa memory an CPU intensive action which can take
several minutes when manyJSP pages are requested in a short
period.
The solution for this is to precompile the JSP pages.
Precompilation meansthat the JSP are compiled offline in batch at
an appropriate moment.
Patch 2886919 "Precompiler for JSP Pages" delivers the
functionality toperform precompilation on JSP Pages. (Note: patch
is included in 11.5.9 andhigher)
The precompilation is done with a perl script which identifies
the JSP'swho need recompilation and compiles them in parallel.
Examples of usage:
Compile all the delta jsp pages
# perl -x ojspCompile.pl --compile
Force compile all the jsp pages
# perl -x ojspCompile.pl --compile --flush
8/2/2019 Pre Compilation of JSP Pages to Improve Performance [ID
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Compile jsp pages with parallelism of 5
# perl -x ojspCompile.pl --compile -p 5
Compile all jsp pages with file names starting with jtf
# perl -x ojspCompile.pl --compile -s "jtf%"
Provides all possible arguments that can be set for the
program
# perl -x ojspCompile.pl
Major advantages are:- Only JSP pages which need recompilation
are compiled, saving time overcompilation of all JSP pages.- Users
do not suffer from decreased performance as a result of JSP
beingcompiled.
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Applications Framework >
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Applications Framework >
Oracle CRM Technical Foundation
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