Monthly Archives: April 2013

ASE 15.7: Threaded Kernel vs. Process Kernel: Throughput Variance

April 7, 2013 · by · in ASE 15.7, ASE Process Kernel, ASE Threaded Kernel, Sun Solaris, Sybase ASE · Leave a comment

I have just finished performing a controlled analysis of general performance differences for ASE 15.7 running process and threaded kernel mode on various platforms and hosts (RHEL running on Dell Xeon chips, Solaris running on SPARC M, SPARC T  and x64).  Although there are quite a few differences, the following image tells the story of […]

LWPs: 12.5.4, 15.7, The Throughput Differences…

April 3, 2013 · by · in ASE 15.7, LWP, Statement Cache, Sybase ASE · Leave a comment

I have just finished a round of throughput checks for LWP performance between versions 12.5.4 and 15.7 – threaded & process kernel mode.   The comparison is a bit “unfair” since I compare 12.5.4 with statement cache disabled (it was in its diapers then), and 15.7 with the statement cache enabled + functionality group enabled […]

ASE 15.7: Threaded vs. Process Kernel Mode – Solaris/RHEL cross-tests

April 2, 2013 · by · in ASE 15.7, ASE Process Kernel, ASE Threaded Kernel, RHEL, Sun Solaris · 1 Comment

I am back with the comparative tests:  threaded kernel mode versus process kernel mode.  I have seen in  my earlier tests that process kernel mode seems to get slightly better throughput under the same workload.  On the other hand, I have also found that process kernel mode have shown certain types of unwanted behavior absent […]