Axis RightFax 8.5 Installationsanleitung PDF herunterladen (Seite 79)

13-3

Application Server

Logging

Although logging is a vital function in Oracle Transportation Management, excessive logging is very

common cause of poor performance. This is particularly true of bulk planning processes. The Log Files

and Logging Overview pages can be used to review what logs are currently enabled. You can also

temporarily disable all logging by setting the following property:

glog.log.suppressAll=true

Setting this property can be a quick method of determining whether logging is the cause of a

performance issue.

Note: Log File and Logging Overview pages on the Configuration and Administration menu

can only be used to display and configure details about log files enabled on the application

server and web server. Logging on the web server can only be controlled through

glog.properties, the WEB_CUSTOM property set or Log File pages that are of type WEB.

Another way to determine if logging is impacting performance is to look at the rate at which log files

are turning over. On the server running Oracle Transportation Management, you can perform a quick

scan of the directory containing the Oracle Transportation Management logs files. If this reveals a log

file that is turning over a 10MB log file several times per second, it is very likely to be impacting

performance.

LogIds with a suffix of “Debug” or “Details” have the potential to log significant amounts of data and

should be avoided unless directed to be by Support. Ad-hoc logs are the most dangerous because they

generate logging regardless of the user logged in. On the other hand, User logs only write to the log

file when that particular user is logged in and using Oracle Transportation Management. In some

scenarios user logs can still have a significant impact on performance, even if that particular user is

not logged in. This logging happens because there is a certain amount of overhead in generating a log

message. The overhead occurs before Oracle Transportation Management determines, based on the

logged in user, that it does not need to write the message to the log file. For this reason, having many

user logs with detailed logging enabled can have a significant impact on performance.

Oracle Transportation Management Business Object Caches

The Oracle Transportation Management Business Object caches are maintained by Oracle

Transportation Management. The majority of Oracle Transportation Management Business Objects

caches use a Least Recently Used (LRU) strategy to maintain the cache. When an LRU cache reaches

its maximum, a one-for-one exchange is made for the new object and the least recently used object in

the cache. Most static data used by Oracle Transportation Management business logic is maintained in

one of these caches. The App-tier Caches utility page, located on the menu under Technical Support –

Diagnostics and Tools – Caches, can be used to review statistics on these caches.

The size of a Business Object Cache can have a significant impact on performance. The efficiency of a

cache is measured by its hit ratio. A low hit ratio is a possible indication of an undersized cache. If a

cache has reached its capacity and the hit ratio is low (less than 0.80), performance may be impacted.

Increasing the maximum size of this cache may increase system performance. Temporary changes

can be made to the cache using the diagnostic screen, but the changes will revert to the default upon

restart. To permanently change the size of a cache the appropriate glog.property must be set. For

example, the size of the Rate Offering cache is set by the following property:

glog.cache.TRateOfferingCache.capacity=2000

It is important to note that increasing the size of the cache has the adverse affect of increasing

memory usage, so changes should be done incrementally and with thorough testing.

1 2 ... 74 75 76 77 78 79 80 81 82 83 84 ... 105 106

Kommentare zu diesen Handbüchern

Keine Kommentare

Axis RightFax 8.5 Installationsanleitung Seite 79

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Software Axis RightFax 8.5