Oracle Team

ODA X6-2S and ODA X6-2M for EE and SE2

By Franck Pachot . After the announcement of the death of SE1 and SE we wondered what Oracle will do for Small and Medium Enterprises and entry level products. The answer was postgres the Oracle Cloud Services, but that's for(…)

Adaptive Plans and SQL Baselines

By Franck Pachot . I encountered recently an issue with Adaptive Plan and SPM. Documentations says that it works perfectly together but I remembered a presentation from Nelson Calero at UKOUG TECH15 mentioning strange behavior. I reproduced the issue and(…)

ORA-01775: looping chain of synonyms

By Franck Pachot . This error message is misleading. You may encounter it when you expect ORA-00942: table or view does not exist. Let's explain(…)

When changing CURSOR_SHARING takes effect?

By Franck Pachot . I usually don't advice to set CURSOR_SHARING=FORCE but imagine your application requires it, you forgot it (or tried to do without) on migration and then everything is slow. You want to change it, but when does(…)

ASM iostats

By Franck Pachot . A few screenshots and a link here. Sysadmins do not like ASM because they don't have the tools they like to manage the disks. For example, they don't want to run SQL queries to check performance,(…)

12c online datafile move and resize

By Franck Pachot . I've described in previous posts how the 12c online datafile move works: your session process do the copy and tells other writers (dbwr and direct-path inserts) to write blocks to both files (old one and new(…)

CPU_COUNT

When you have less CPU threads than the number of processes that has something to run in CPU, the OS will schedule them to share the CPU resource. Increasing the workload at that point will not increase the throughput because(…)

Large Pages on Windows

By Franck Pachot .

Discovering SharePlex for Oracle

By Mouhamadou Diaw Nowadays, replicating data is very important. Many tools exist in the market (Goldengate, Dbvisit …). In this article we talk about a Dell Product tool that can be used for data replication: SharePlex. The goal is to(…)

Instance Caging and multitenant: do the right setting

When you want to do instance caging, you have to set manually CPU_COUNT and to set a resource manager plan. If you By Franck Pachot . only the CPU_COUNT no instance caging will occur. Except during the maintenance window where(…)