390.3 OpenLDAP Server Performance Tuning (weight: 2) LPIC-3-MIXED-ENVIRONMENTS Practice Questions (Page 3)

Questions 11–15

1. 11expert · hard

   An administrator is troubleshooting slow searches on an OpenLDAP server. The searches use the filter (|(uid=john)(mail=john@example.com)). The administrator has indexes on uid and mail. The searches are still slow. What is the most likely cause?

   • AThe loglevel is set to 0.
   • BThe threads directive is set too low.
   • CThe cachesize is too small.
   • DThe OR filter requires a union index that is not defined.
   Reveal Solution Discussion Select an answer first
2. 12application · medium

   A system administrator is tuning an OpenLDAP server that uses the MDB backend. The server has 64 GB of RAM, but the database is 100 GB. The administrator wants to ensure that the most frequently accessed entries are served from memory. Which setting is most important to adjust?

   • AEnsure the OS has enough free memory for file caching.
   • BIncrease the threads directive to 64.
   • CSet the cachesize to 1000000.
   • DSet the dbnosync directive to on.
   Reveal Solution Discussion Select an answer first
4. 13application · medium

   A financial services firm runs OpenLDAP with MDB backend. The server is on a system with a battery-backed write cache. The administrator wants to improve write performance while maintaining reasonable durability. Which configuration change is most appropriate?

   • ASet the loglevel directive to 0.
   • BSet the dbnosync directive to on.
   • CIncrease the cachesize directive to 50000.
   • DIncrease the checkpoint interval to 1024 60.
   Reveal Solution Discussion Select an answer first
5. 14application · medium

   An administrator has just added a new index for the mail attribute to improve search performance. After restarting slapd, searches for mail are still slow. What is the most likely cause?

   • AThe index was not rebuilt with slapindex.
   • BThe threads directive is set too low.
   • CThe loglevel is set to 0.
   • DThe cachesize is too small.
   Reveal Solution Discussion Select an answer first
6. 15expert · hard

   An OpenLDAP server uses the MDB backend. The administrator is tuning the server and notices that searches for a common attribute are slow. The attribute is indexed. The server has 32 GB of RAM, and the database is 50 GB. The administrator has set cachesize to 500000. Which action is most likely to improve search performance?

   • AIncrease the threads directive to 64.
   • BIncrease the OS file cache size by freeing up memory.
   • CIncrease the cachesize to 1000000.
   • DEnsure the index is rebuilt with slapindex.
   Reveal Solution Discussion Select an answer first