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IBM’s Suggestions for Tuning
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Try to disable, if possible, the Information Governance Catalog (IGC
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) lineage for those objects for which lineage is not required. See https://www.ibm.com/support/knowledgecenter/SSZJPZ_11.7.0/com.ibm.swg.im.iis.mdwb.doc/topics/t_configAssetsForBusinessLineage.html.
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Improve performance of DB2 XMETA (RUNSTATS and REORG on tables)
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Increase WAS
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heap size. See https://www.ibm.com/docs/en/iis/11.5?topic=catalog-computing-allocating-memory-information-governance.
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Manage operational metadata. If you only need operational metadata from the last thirty days remove
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metadata older than thirty days using
istool
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Conclusion
This list of possible causes is not exhaustive, and is only provided to provide starting points for your own investigation of the issue.