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--- administration:performance [2017/04/13 08:20] – [Further Reading] emaijala
+++ administration:performance [2018/06/05 19:08] – [Offloading MARC Records] demiankatz
@@ Line 138: / Line 138: @@
 from module directory.
+===== Asset Pipeline =====
+Starting with VuFind 3.1, there is an optional "asset pipeline" which can be used to combine Javascript and/or CSS files together to reduce the number of HTTP requests necessary to load VuFind pages. This is turned off by default but can be activated using the asset_pipeline setting in [[configuration:files:config.ini|config.ini]].
+===== Theme Compiler =====
+Starting with VuFind 4.1, there is a [[administration:command_line_utilities|command-line tool]] known as the "theme compiler" which can be run to flatten a hierarchy of themes into a single flat theme, reducing the amount of file searching VuFind needs to do in order to find assets and templates.
+To use a compiled theme, follow these steps:
+. Run "php $VUFIND_HOME/public/index.php compile theme [your theme] [your compiled theme]" at the command line.
+. Update your [[configuration:files:config.ini|config.ini]] file to use [your compiled theme] instead of [your theme] in the theme setting.
+Note: NEVER EDIT THE COMPILED THEME. Instead, edit the source theme and recompile it when you need to make changes. You must use the --force switch of the compiler if you need to overwrite your compiled theme with a new version.
+===== Session Handling =====
+When using database sessions, deleting expired sessions may be a surprisingly heavy process. On a busy site it may be beneficial to turn off PHP's session garbage collection (set session.gc_probability to 0 in php.ini) and run VuFind's expire_sessions utility regularly. This makes sure that garbage collection is done outside Apache that serves user requests and with a method that makes it possible to handle session deletion in a large table.
 ===== Troubleshooting =====
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 See the [[configuration:remote_marc_records|Remote MARC Records]] page for details on reducing index size by storing MARC records externally to your Solr index. (Note: requires VuFind 2.5 or newer).
+===== Limits =====
+Certain operating system limits can impact Solr performance, and starting with release 7.3.1, the software will warn you if you are below the recommended thresholds. See the [[administration:starting_and_stopping_solr#linux_method|Linux startup instructions]] for notes on how to correct this problem.
 ===== Further Reading =====
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 Search engine crawlers can sometimes put a heavy load on your server, causing performance issues for actual users. The behavior of search engine robots can be controlled with the help of a [[administration:robots.txt]] file. See the [[administration:robots.txt]] page for more details.
-====== Asset Pipeline ======
-Starting with VuFind 3.1, there is an optional "asset pipeline" which can be used to combine Javascript and/or CSS files together to reduce the number of HTTP requests necessary to load VuFind pages. This is turned off by default but can be activated using the asset_pipeline setting in [[configuration:files:config.ini|config.ini]].
 ====== Testing Performance ======