Archivo del Autor: carlosap

Using lsof utility

lsof is one of the little known but very powerfull utility in Linux. Man pages basically says that lsof: list open files. But you can use it for managing and tracking network connections, you can list open ports, identify connections currently being made to your system, and determine what resources a process is using. Not… Leer más »

install sound drivers in Windows 3.11 in VMware

http://www.scampers.org/steve/vmware/ I don’t know if this is already been discussed, but I found a way to install sound drivers in Windows NT 3.51 in VMware. This also work for Windows NT 4.0 and Windows 9x OS. Here is the way that should work. Be sure you have VMware closed or another OS is selected: Step… Leer más »

performance progress

incrementar checkpoints dbfinanzas bi log cluster size to 16 MB. proutil dbbasename -C truncate bi bi -bi 16384 set bi log block size to 8 kb. proutil dbbasename-C truncate bi -biblocksize 8 Set -bibufs to 25.  -spin 6000*#procesadores AIW 5 o más

How to tune BI I/O performance

The following is extracted from the v8 documentation. Before-image I/O Before-imaging is always enabled to let PROGRESS recover transactions if the system fails. This mechanism is extremely important for database reliability, but it creates a significant amount of I/O that can affect performance. In addition, before-image I/O is usually the first and most likely cause… Leer más »

FIO Perf Tool Nutshell

FIO is an I/O tool meant to be used both for benchmark and stress/hardware verification. It has support for 13 different types of I/O engines (sync, mmap, libaio, posixaio, SG v3, splice, null, network, syslet, guasi, solarisaio, and more), I/O priorities (for newer Linux kernels), rate I/O, forked or threaded jobs, and much more. It… Leer más »