Documentation Home > Sun Java System Web Server 7.0 Update 1 Performance Tuning, Sizing, and Scaling Guide > Chapter 2 Tuning Sun Java System Web Server > Using Monitoring Data to Tune Your Server > DNS Cache Information > Hit Ratio (Cache Hits / Cache Lookups)...
To interpret the buffer cache hit ratio, consider the following factors: Avoid repeated scanning of frequently accessed data by performing the processing in a single pass or by optimizing the SQL statement. Repeated scanning of the same large table or index can artificially inflate a low cache hit...
Number of LUNs in a SmartCache partition. File Systems Number of file systems in a SmartCache partition. Read SmartCache Hit Ratio Ratio of read hits in a SmartCache partition to all read I/Os, collected at an interval of 30 seconds. Operation Operations that you can perform on a SmartCa...
Wu et al. “E-MACSC: A Novel Dynamic Cache Tuning Technique to Maintain the Hit Ratio Prescribed by the User in Internet Applications.” Springer, 2006. pp. 65-72.Wu et al. " E-MACSC: A Novel Dynamic Cache Tuning Technique to Maintain the Hit Ratio Prescribed by the User in ...
sql-prepared-plan-cache.md sql-tuning-overview.md stale-read.md statement-summary-tables.md statistics.md subquery-optimization.md support.md system-variables.md table-attributes.md table-filter.md telemetry.md temporary-tables.md three-data-centers-in-two-cities-deployment.md ticdc-deployment-t...
You are seeing evidence of an excessive number of query compilations or recompilations in SQL Server. This may be manifesting itself as high CPU load, or longer transaction execution times. You need to identify which queries are causing this behavior and
in use by the file cache. As the number of System Cache Resident Bytes increases, we normally expect that the various measures of hit ratio will also increase. Moreover, the cache size can grow simply as a function of the size of the files that are currently in use and their pattern ...
This paper presents a QoS-oriented e-commerce benchmark, which is named Bench4Q and is an extension of TPC-W supporting QoS-oriented tuning of e-commerce servers. The main features of Bench4Q include: (1) supporting session-based metrics analysis and (2) simulating QoS-sensitive load for ...
hit_ratio ) AS SELECT d.name database_name, t.name tablespace_name, o.owner, NVL(o.object_name, '('||MAX(cc.object_id)||')') object_name, o.object_type, ROUND(SUM(cached_keep_size)/1024/1024) keep_mb, ROUND(SUM(cached_size)/1024/1024) tot_mb, ...
cache faults/sec can show up to be a high number when SQL Server tries to look for a page first in the cache, does not find it and hence has to load it from disk. You should probably monitor wait stats for IO/Disk - http://www.brentozar.com/sql/wait-stats/ , if you have...