About

Martin Klier

usn-it.de

Oracle gridSetup.sh Fails with Error Code 255

Bash Error 255 Sometimes you have to apply a RU when launching Oracle 19c gridSetup.sh to install Oracle Grid Infrastructure or Oracle restart. For example when you install it in its vanilla 19.3 version on Oracle Linux 8. OL8 did not exist when they made 19.3, so some of its specials (like verifying group/user existence) […]

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Make Linux Disk IDs Visible for UDEV (in VMware)

VMware is a factor Times and syntaxes change, so it’s time to refresh an old blog post a bit. Especially VMware has established its place in the Oracle world, and it can be tricky to map disk IDs directly into the VM. Many sources recommend to use the SCSI addresses, but I learned to never […]

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Oracle on Windows: ASM instance terminated by LMON / ORA-27300 IPC_TCPConnectCheck failed with status -1

Recently I had an issue with a two-node Grid Infrastructure on Windows 2012R2. After an infrastructure-caused cluster restart (irresponsible SAN hardware patching 🙂 ), everything was running on Node 2, and Node 1 could not join the cluster any more. No easy solution: On CSSD level, there was no issue (network and disk heartbeat worked, […]

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Oracle on SLES12 SP2 – Avoiding Cgroup Task Limit

Once upon a time, there was an Oracle RAC cluster 12.2.0.1 on SUSE Linux Enterprise Server (SLES) 12 SP2, that did not do well. Its database and ASM instances used to fail with: ORA-27300: OS system dependent operation:fork failed with status: 11 ORA-27301: OS failure message: Resource temporarily unavailable ORA-27302: failure occurred at: skgpspawn3 Of […]

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Oracle RAC 12.2 on SLES12 – How to disable Hardware Lock Elision Support

The Problem In the last week, I had to set up an Oracle RAC (and thus, the Clusterware) version 12.2.0.1 on SuSE Linux Enterprise Server 12 SP2 (SLES12 Sp2). The gridSetup.sh failed latest in root.sh of the first node with a kinda non-intuitive error: CRS-5804: Communication error with agent process CRS-4000: Command Start failed, or […]

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Oracle 11g unable to extend datafile but ASM disk group shows free space

Sometimes Oracle Database 11gR2 complains about not being able to extend a (lob) segment with ORA-1691, but ASM monitoring based on USABLE_FILE_MB did not fire. Adding a new data file fails with ASM ORA-15041. I was under the impression this behaviour of ASM deserved some explanation. Situation Database Alert Log complains with ORA-1691: ORA-1691: unable to extend lobsegment MYUSER.SYS_LOB0013128030C00003$$ […]

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Featured by Oracle Magazine

The Oracle Magazine featured me in its January / February 2016 issue. I really feel honoured and would like to say thank you for the opportunity! For details, please see the Performing Databases Blog post about the publication. […]

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DOAG noon2noon RAC & Dataguard – Quick Report

There’s always something to learn – for example about Oracle RAC (Real Application Clusters) and Dataguard. And the old-school frontal teaching concept is boring, and more important, ineffective after a few hours of passive listening. So the German Oracle Users Group DOAG organized a “noon2noon” event: “Oracle RAC and Dataguard” this week in WĂĽrzburg (January 2 1st-22nd 2016). It was the […]

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