Kofax Communication Server 10.0.0 - Manual (Page 61)

Environment Guide Version 10.00.00
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%Disk Read Time 0.8
TCOSS Disk Read kB/sec 199
Reads/sec 16
Write kB/sec 595
Writes/sec 97
Update kB/sec 454
Update Write kB/sec 335
TCOSS Cache Database Cache Misses/sec 1.7
Directory Cache Misses/sec 1.4
Document Cache Misses/sec 13
Processor _Total % Processor Time (0 ..100) 31
Process TCOSS % Processor Time (0 ..400) 29
The additional disk writes caused by the update from the secondary master are seen in the TCOSS Disk
performance counter “Update Write kB/sec”. The 335 kB are written in 16 kB blocks and cause about 21
additional disk writes per second. Together with the 97 Writes/sec from regular TCOSS activity they sum up
to the 118 Disk Writes/sec observed on the physical disk.
The low value of 8. 7 in the “Disk Reads/sec” performance counter of the physical disk is probably caused
by the OS disk cache. According to the TCOSS Disk performance counter “Reads/sec” there are 16 reads
from regular TCOSS activity, plus some from the tandem update.
During the tandem update phase the outbound fax queue length was stable at around 5600. The
performance numbers of the case without tandem update were done with an increasing queue length (at a
rate of about 700 per hour). This would explain the lower number of Writes/sec from regular TCOSS activity
(97 vs. 100). The tandem update did not slow down the test message work flow.
5.9.5 Test Results: Two-Page Messages and Increased TCOSS Cache
This test was done with the same workload as in the two-page messages test above, only the TCOSS
cache size was increased:
Registry key Value
TCOSS/Drive0/DirCacheSize 20480
TCOSS/Drive0/DocCacheSize 1024000
TCOSS/Drive0/DataBaseCacheSize 102400
The TCOSS document cache started to fail after about 1700 outbound messages had been queued up. The
other queues, inbound messages and notifications, were stable throughout the test and both below 100.
These values were measured on the primary system with less than 1700 message queued:
Object Instance Counter Value
Physical Disk D: (TCOSS) Disk Writes/sec 103
Disk Write Bytes/sec 635,000
Disk Reads/sec 2.7
Disk Read Bytes/sec 5,700
%Disk Write Time 66
%Disk Read Time 1.3
TCOSS Cache Database Cache Misses/sec 0.6
Directory Cache Misses/sec 1.3
Document Cache Misses/sec 0.8
Processor _Total % Processor Time (0 ..100) 33
Process TCOSS % Processor Time (0 ..400) 30
TCOSS Private Bytes 1,554,000,000
Virtual Bytes 2,069,000,000