SLOB

티베로 – The AWR-like “Tibero Performance Repository”

By Franck Pachot . In a previous post I introduced Tibero as The most compatible alternative to Oracle Database. Compatibility is one thing but one day you will want to compare the performance. I'll not do(…)

Which Bitnami service to choose in the Oracle Cloud Infrastructure?

By Franck Pachot . In the Oracle Cloud PaaS you have a marketplace where you can choose your service. Some are packaged from Bitnami and available on multiple OS. My first idea is that in PaaS you do not care(…)

Postgres, the fsync() issue, and ‘pgio’ (the SLOB method for PostgreSQL)

By Franck Pachot . That's a long blog post title, which is actually just a good pretext to play with Kevin Closson SLOB method for PostgreSQL: pgio I use the beta version of pgio here. If you want to read(…)

Spectre and Meltdown on Oracle Public Cloud UEK – LIO

By Franck Pachot . In the last post I published the strange results I had when testing physical I/O with the latest Spectre and Meltdown patches. There is the logical I/O with(…)

Spectre/Meltdown on Oracle Public Cloud UEK – PIO

By Franck Pachot . The Spectre and Meltdown is now in the latest Oracle UEK kernel, after updating it with 'yum update': [opc@PTI ~]$ rpm -q --changelog kernel-uek | awk '/CVE-2017-5715|CVE-2017-5753|CVE-2017-5754/{print $NF}' | sort | uniq -c 43 {CVE-2017-5715} 16(…)

Spectre and Meltdown, Oracle Database, AWS, SLOB

By Franck Pachot . Last year, I measured the CPU performance for an Oracle Database on several types of AWS instances. Just by curiosity, I've run the same test (SLOB cached reads)(…)

Google Cloud Platform instances and Oracle Database

By Franck Pachot . When it comes to choose a cloud instance to run Oracle Database, you want to be able to run your workload on the minimum CPU cores. This is why in a previous(…)

Running SLOB on Exadata Express Cloud Service

By Franck Pachot . The Exadata Express Cloud Service is a managed PDBaaS: Oracle is the system admin and the CDB database administrator, you are the PDB administrator. You connect with a local user, PDB_ADMIN, which is no SYSDBA privilege(…)

Exadata X-5 Bare Metal vs. OVM performance

By Franck Pachot . The Exadata X5 can be installed Bare Metal or Virtualized. The latter one, Oracle VM allows to create multiple clusters on one machine, is more complex for installation and for storage capacity planning. But it allows(…)

Extended clusters and asm_preferred_read_failure_groups

By Franck Pachot . When you have 2 sites that are not too far you can build an extended cluster. You have one node on each site. And you can also use ASM normal redundancy to store data on each(…)