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Symptoms

JIRA slows down or performs poorly or hits an Out of Memory Exception. The following types of threads are in the thread dump:

Please note that the appearance of this thread in a thread dump may not be problematic; it's a normal function of JIRA and may be disregarded if there are no performance problems.

The important line is:

com.atlassian.jira.issue.views.SearchRequestXMLView.writeSearchResults

Cause

XML rendering is required for Displaying Search Results in XML. One common use is the jiraissues macro in Confluence. In a large instance, this can cause poor performance because the results are not paged and require XML transformation.

Resolution

Change the jira.search.views.max.limit parameter. Make sure to do this one, rather than the default max limit. See Limiting the number of issues returned from a search view such as an RSS feed.

There are also requests to improve this at JRA-20346 and JRA-20347.

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