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Tanel Poder Blog

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Tanel Poder Blog

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- Linux, Oracle, SQL performance tuning and troubleshooting training & writing.

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Ancla Tipo Jugo
Home Interna Pasando Jugo
About Interna Pasando Jugo
Code Interna Pasando Jugo
Contact Interna Pasando Jugo
Topics Interna Pasando Jugo
Videos Interna Pasando Jugo
Consulting Interna Pasando Jugo
Training Interna Pasando Jugo
Practical Linux Performance & Troubleshooting Interna Pasando Jugo
Dimensional Analysis of System Performance with eBPF & xtop Interna Pasando Jugo
Efficient, Always-On Thread Level Observability with eBPF Externo Pasando Jugo
Testing the Datadog Explain Plan Visualizer with Oracle execution plans Interna Pasando Jugo
New scripts: vstat.sql & dstat.sql for showing Oracle Sysmetric history with 1-minute granularity Interna Pasando Jugo
xb.sql and xbi.sql - Explain Oracle Execution Plans Better! (Part 3 - Cardinality Misestimates) Interna Pasando Jugo
tabhisthybrid.sql: Display Oracle hybrid histograms and filter cardinality estimates Interna Pasando Jugo
pqr.sql: Generate QR Codes with Pure SQL in PostgreSQL Interna Pasando Jugo
The xCapture and xtop eBPF tools are now in beta, with a demo dataset Interna Pasando Jugo
CatVector Demo Website Interna Pasando Jugo
New Tool: xstack - Completely Passive eBPF Linux Stack Profiling Without Any Tracepoints Interna Pasando Jugo
Webinar: Testing High-Performance Vector Search With CatBench on Google AlloyDB Omni Interna Pasando Jugo
My Blog Has Turned 18 Years Old Interna Pasando Jugo
Catbench Vector Search App has Postgres Query Throughput and Latency Monitoring Now Interna Pasando Jugo
Using Postgres pg_test_fsync tool for testing low latency writes Interna Pasando Jugo
Find which Oracle SQL_ID hits the SQL*Net break/reset to client event Interna Pasando Jugo
New Tool: lsds - List All Linux Block Devices and Settings in One Place Interna Pasando Jugo
Optimizing eBPF I/O latency accounting when running 37M IOPS on a 384-CPU server Interna Pasando Jugo
xCapture v3: Linux Performance Analysis with Modern eBPF and DuckDB Interna Pasando Jugo
Core Function Words Translated between English, Spanish, German, French and Swedish Interna Pasando Jugo
When eBPF task->stack->pt_regs reads return garbage on the latest Linux kernels, blame Fred! Interna Pasando Jugo
TracepointArgs: List Any Linux Tracepoint with Their Arguments, Datatypes and Related Structs Interna Pasando Jugo
CatBench Vector Search Playground Interna Pasando Jugo
Embedding Vectors of the Same Image Rotated Over 360 Degrees Interna Pasando Jugo
SQL Plan Execution FlameGraphs with Loop and Row Counts Interna Pasando Jugo
Embedding Vectors vs. Vector Embeddings Interna Pasando Jugo
Video: Testing the Silk Platform in 2024 Interview (12 minutes) Interna Pasando Jugo
Testing the Silk Platform in 2024: Achieving 20 GiB/s I/O Throughput in a Single Cloud VM Interna Pasando Jugo
Visualizing and Comparing Embedding Vectors as Heatmaps (Videos) Interna Pasando Jugo
Visualizing and Comparing Embedding Vectors as Heatmaps Interna Pasando Jugo
Tracking, not Tracing, Linux Thread Activity for Complete System Visibility (eBPF Summit) Interna Pasando Jugo
Python Supports Profiling with Perf - How Does It Work? Interna Pasando Jugo
Can a User Process Consume Kernel Mode CPU Without a Syscall? Interna Pasando Jugo
Next Big Thing: X-Ray Vision for Linux Systems with eBPF Interna Pasando Jugo
Syscallargs: List All Linux System Calls With Their Arguments Interna Pasando Jugo
RTX4090 converted into an eGPU Interna Pasando Jugo
Oracle Hint Scopes and Join Level Cardinality Hint Interna Pasando Jugo
New Commenting System Interna Pasando Jugo
Oracle Shared Pool Internals: Allocated Chunk Status Indicators in Heap Dumps Interna Pasando Jugo
Oracle Index Parallel Degree Fix After Parallel Creation or Rebuild Interna Pasando Jugo
Report Current Oracle Session Wait Chains from GV$SESSION without ASH Interna Pasando Jugo
Advanced Oracle Troubleshooting Guide, Part 13: OStackProf for Linux, Unix & MacOSX Clients Interna Pasando Jugo
Testing Oracle's Use of Optane Persistent Memory, Part 2 - Fast Log File Sync Waits Interna Pasando Jugo
Testing Oracle's Use of Optane Persistent Memory, Part 1 - Low Latency Commits Interna Pasando Jugo
MySQL Now Shows its Thread Names at OS Level for Better Troubleshooting Interna Pasando Jugo
xb.sql and xbi.sql - Explain Oracle Execution Plans Better! (Part 2) Interna Pasando Jugo
My New Learning Platform and What I'm Up To in 2022 Interna Pasando Jugo
Achieving 10 GB/s Scanning Rate in a Single Cloud VM Interna Pasando Jugo
Testing The Silk Platform - Hands-On Technical Analysis of High-Performance I/O in the Cloud Interna Pasando Jugo
Virtual Conference: Troubleshooting Very Complex Oracle Performance Problems Interna Pasando Jugo
Do Not Use '>' in Your Command Prompt (and How to Stay Safe in Shell) Interna Pasando Jugo
Is Your Linux Version Hiding Interrupt CPU Usage From You? Interna Pasando Jugo
Video: High Performance Block I/O on Linux Interna Pasando Jugo
Achieving 11M IOPS & 66 GiB/s IO on a Single ThreadRipper Workstation Interna Pasando Jugo
Oracle Wait Event Name vs. Display Name Interna Pasando Jugo
Measuring Java JVM thread activity in Linux with task state sampling Interna Pasando Jugo
Reasons why SELECT * is bad for SQL performance Interna Pasando Jugo
High System Load with Low CPU Utilization on Linux? Interna Pasando Jugo
Hacking Session: 7 Levels of Hint Invalidity in Oracle SQL Interna Pasando Jugo
Hacking Session: Oracle SQL Monitoring - Understanding the Execution Timeline column and CPU usage Interna Pasando Jugo
Virtual Conference: Systematic Oracle SQL Optimization Interview Videos Interna Pasando Jugo
Oracle Fatal Background Processes Interna Pasando Jugo
Virtual Conference Update: Systematic Oracle SQL Optimization in 2020 Interna Pasando Jugo
Oracle Shared Pool Internals: List Chunk Position in the LRU List Interna Pasando Jugo
SchedLat: a Low Tech Script for Measuring Process CPU Scheduling Latency on Linux Interna Pasando Jugo
Announcing My Retirement (in 2030)! Interna Pasando Jugo
ORA-12850: Could not allocate slaves on all specified instances error and a workaround for my scripts Interna Pasando Jugo
Oracle Performance Troubleshooting Without OS Access, Part 1: Identifying CPU Scheduling Latency Interna Pasando Jugo
Video: Troubleshooting Complex Oracle Performance Problems (Jan 2020) Interna Pasando Jugo
Hacking Session: Troubleshooting Complex Oracle Performance Problems (January 2020) Interna Pasando Jugo
help.sql: Show TPT Script Purpose and Syntax Interna Pasando Jugo
Oracle State Objects and Reading System State Dumps Hacking Session Video Interna Pasando Jugo
New scripts: xb.sql and xbi.sql - Explain Oracle Execution Plans Better! (Part 1) Interna Pasando Jugo
Dump Current Oracle SQL Execution Plan Line ID Using Oradebug Interna Pasando Jugo
pSnapper: Linux Process Snapper Page and Videos Interna Pasando Jugo
Announcing Linux Process Snapper tool and a Linux Troubleshooting Hacking Session (3rd April 9am PDT) Interna Pasando Jugo
What Caused This Wait Event: Using Oracle's wait_event[] tracing Interna Pasando Jugo
Tutorial: Troubleshooting Linux SSH Login Delay - Why does logging in always take 10 seconds? Interna Pasando Jugo
Practical Linux Performance & Application Troubleshooting Training Details and Table of Contents Interna Pasando Jugo
Scripts for Drilling Down Into Unknown Optimizer Changes Interna Pasando Jugo
Visualizing SQL Plan Execution Time With FlameGraphs Interna Pasando Jugo
Generate Oracle SQL Monitoring Reports as HTML using SQL Developer v18.3 (no Flash needed) Interna Pasando Jugo
Log file switch (checkpoint incomplete) wait events and LGWR waiting for checkpoint progress Interna Pasando Jugo
Oracle SQL Monitoring and Advanced ASH Usage Hacking Sessions! Interna Pasando Jugo
Oracle SQL Tuning training & Oracle Troubleshooting training and some Linux stuff too! Interna Pasando Jugo
Webinar: Troubleshooting a Complex Oracle Performance Issue Interna Pasando Jugo
My Performance & Troubleshooting scripts (TPT) for Oracle are now in GitHub and open sourced Interna Pasando Jugo
Video: Oracle X$TRACE, Wait Event Internals and Background Process Communication Interna Pasando Jugo
Secret Hacking Session: Oracle Background Process Communication, Exotic Wait Events and Some Tracing too Interna Pasando Jugo
Advanced Oracle Troubleshooting seminar in 2018! Interna Pasando Jugo
Apache Impala Internals Deep Dive with Tanel Poder + Gluent New World Training Month Interna Pasando Jugo
GNW01: In-Memory Processing for Databases Interna Pasando Jugo
My BIWA Summit Presentations Interna Pasando Jugo
RAM is the new disk – and how to measure its performance – Part 3 – CPU Instructions & Cycles Interna Pasando Jugo
My New Youtube Channel Interna Pasando Jugo
Troubleshooting Another Complex Performance Issue – Oracle direct path inserts and SEG$ contention Interna Pasando Jugo
SQL Monitoring in Oracle Database 12c Interna Pasando Jugo
Advanced Oracle Troubleshooting v2.5 (with 12c stuff too) Interna Pasando Jugo
RAM is the new disk – and how to measure its performance – Part 2 – Tools Interna Pasando Jugo
RAM is the new disk – and how to measure its performance – Part 1 – Introduction Interna Pasando Jugo
The Hybrid World is Coming Interna Pasando Jugo
Old ventures and new adventures Interna Pasando Jugo
Advanced Oracle Troubleshooting Guide – Part 12: control file reads causing enq: SQ – contention waits? Interna Pasando Jugo
Sqlplus is my second home, part 8: Embedding multiple sqlplus arguments into one variable Interna Pasando Jugo
Oracle Exadata Performance: Latest Improvements and Less Known Features Interna Pasando Jugo
Oracle In-Memory Column Store Internals – Part 1 – Which SIMD extensions are getting used? Interna Pasando Jugo
About index range scans, disk re-reads and how your new car can go 600 miles per hour! Interna Pasando Jugo
Combining Bloom Filter Offloading and Storage Indexes on Exadata Interna Pasando Jugo
What the heck are the /dev/shm/JOXSHM_EXT_x files on Linux? Interna Pasando Jugo
Oracle Memory Troubleshooting, Part 4: Drilling down into PGA memory usage with V$PROCESS_MEMORY_DETAIL Interna Pasando Jugo
Slides of my previous presentations Interna Pasando Jugo
Where does the Exadata storage() predicate come from? Interna Pasando Jugo
Oracle X$ tables – Part 1 – Where do they get their data from? Interna Pasando Jugo
cell flash cache read hits vs. cell writes to flash cache statistics on Exadata Interna Pasando Jugo
Hard Drive Predictive Failures on Linux and Exadata Interna Pasando Jugo
When do Oracle Parallel Execution Slaves issue buffered physical reads – Part 2? Interna Pasando Jugo
When do Oracle Parallel Execution Slaves issue buffered physical reads – Part 1? Interna Pasando Jugo
Diagnosing buffer busy waits with the ash_wait_chains.sql script (v0.2) Interna Pasando Jugo
SGA bigger than the amount of HugePages configured (Linux – 11.2.0.3) Interna Pasando Jugo
Why doesn’t ALTER SYSTEM SET EVENTS set the events or tracing immediately? Interna Pasando Jugo
Advanced Oracle Troubleshooting Guide – Part 11: Complex Wait Chain Signature Analysis with ash_wait_chains.sql Interna Pasando Jugo
Oracle Performance & Troubleshooting Online Seminars in 2013 Interna Pasando Jugo
Scalar Subqueries in Oracle SQL WHERE clauses (and a little bit of Exadata stuff too) Interna Pasando Jugo
ShowMOS: How to get rid of the annoying “The Page has Expired” dialog in My Oracle Support Interna Pasando Jugo
Oracle 12c: Scalar Subquery Unnesting transformation Interna Pasando Jugo
Oracle Database 12c R1 (12.1.0.1.0) is finally released! Interna Pasando Jugo
Getting the Most Out of ASH online seminar Interna Pasando Jugo
Forcing Smart Scans on Exadata – is the _serial_direct_read parameter safe to use in production? Interna Pasando Jugo
Debugger Dangers – Part 2 Interna Pasando Jugo
List Exadata Storage Cell disk summary with cellpd.sql and cellpdx.sql scripts Interna Pasando Jugo
List Exadata Disk Layout and Topology with the exadisktopo scripts Interna Pasando Jugo
V$CELL_THREAD_HISTORY – “ASH” for Exadata Storage Cells Interna Pasando Jugo
Understanding what a hint affects using the V$SQL_FEATURE views Interna Pasando Jugo
Listing Exadata storage cells and their configuration info from V$CELL_CONFIG Interna Pasando Jugo
Alter session force parallel query doesn’t really force anything Interna Pasando Jugo
asqlmon.sql: SQL Monitoring-like execution plan line level drilldown into SQL response time Interna Pasando Jugo
ExaSnapper 0.7 beta download and the hacking session videos Interna Pasando Jugo
Peeking into Linux kernel-land using /proc filesystem for quick’n’dirty troubleshooting Interna Pasando Jugo
Even more Snapper – v4.03 now works in SQL Developer too! Interna Pasando Jugo
Manual “before” and “after” snapshot support in Snapper v4 Interna Pasando Jugo
Snapper v4.02 and the Snapper launch party video Interna Pasando Jugo
Drilling Deep Into Exadata Performance with ASH, SQL Monitoring and Exadata Snapper – slides and a hacking session! Interna Pasando Jugo
Troubleshooting high CPU usage with poor-man’s stack profiler – in a one-liner! Interna Pasando Jugo
Session Snapper v4 – The World’s Most Advanced Oracle Troubleshooting Script! Interna Pasando Jugo
Sqlplus is my second home: Part 7 – Downloading files via sqlplus :-) Interna Pasando Jugo
Japanese translation of some of my blog articles Interna Pasando Jugo
What the heck is the INTERNAL_FUNCTION in execution plan predicate section? Interna Pasando Jugo
A tip for lazy Oracle users – type less with ANSI DATE and TIMESTAMP SQL syntax Interna Pasando Jugo
Snapper v3.61 released – and more work is in progress! Interna Pasando Jugo
Select statement generating redo – and lost write detection Interna Pasando Jugo
Sqlplus is my second home: Part 6 – Colorizing sqlplus and terminal output Interna Pasando Jugo
Optimizer statistics-driven direct path read decision for full table scans (_direct_read_decision_statistics_driven) Interna Pasando Jugo
The limitations of CURSOR_SHARING = FORCE and FORCE_MATCHING_SIGNATURE for SQL plan stability Interna Pasando Jugo
MOATS-like sqlplus “top” utility for RAC Interna Pasando Jugo
Oradebug hanganalyze with a prelim connection and “ERROR: Can not perform hang analysis dump without a process state object and a session state object.” Interna Pasando Jugo
Advanced Oracle Troubleshooting Guide – Part 10: Index unique scan doing multiblock reads?! Interna Pasando Jugo
Where is LOB data stored? Interna Pasando Jugo
Exadata Smart Scan predicate offloading and sequence.NEXTVAL Interna Pasando Jugo
Create a database link with the new host:port/service syntax Interna Pasando Jugo
Oracle Core: Essential Internals for DBAs and Developers book by Jonathan Lewis Interna Pasando Jugo
Profiling trace files with preprocessor external tables in 11g and some parallel execution hacking Interna Pasando Jugo
Evil things are happening in Oracle Interna Pasando Jugo
What the heck is the SQL Execution ID – SQL_EXEC_ID? Interna Pasando Jugo
V8 Bundled Exec call – and Oracle Program Interface (OPI) calls Interna Pasando Jugo
Full scans, direct path reads and ORA-8103 error hacking session video Interna Pasando Jugo
Are you getting the most out of your Exadata performance? Part 1 Interna Pasando Jugo
What is the purpose of segment level checkpoint before DROP/TRUNCATE of a table? Interna Pasando Jugo
Another cache buffers chains latch contention troubleshooting example using LatchProf Interna Pasando Jugo
Tech Reviewer, Tech Reviewer! ;-) Interna Pasando Jugo
IOUG Select Journal Editor’s Choice Award 2011 Interna Pasando Jugo
Knowing what you want to achieve before thinking of how to achieve it – a query optimization example Interna Pasando Jugo
Running SELECT … INTO :bind_variable from SQL Interna Pasando Jugo
Latch contention troubleshooting case study and Flashback Database performance issues with LOBs Interna Pasando Jugo
MOATS: The Mother of All Tuning Scripts! Interna Pasando Jugo
An index of my TPT scripts Interna Pasando Jugo
LOBREAD SQL Trace entry in Oracle 11.2 (and tracing OPI calls with event 10051) Interna Pasando Jugo
Implicit datatype conversion in the parsing phase – something new I learned today! Interna Pasando Jugo
ORA-4031 errors, contention, cursor management issues and shared pool fragmentation – free secret seminar! Interna Pasando Jugo
Exadata CAN do smart scans on bitmap indexes Interna Pasando Jugo
Oracle Exadata Performance series – Part 1: Should I use Hugepages on Linux Database Nodes? Interna Pasando Jugo
Finding Oracle Homes which Oracle instances are using on Linux Interna Pasando Jugo
New cursor_bind_capture_destination parameter in Oracle 11.2.0.2 Interna Pasando Jugo
Performance Stories from Exadata Migrations Interna Pasando Jugo
Is this valid SQL syntax? :-) Interna Pasando Jugo
Snapper 3.52 – With Oracle 9.2 support! Interna Pasando Jugo
Asynch descriptor resize wait event in Oracle Interna Pasando Jugo
A little new feature for shared pool geeks :-) Interna Pasando Jugo
COUNT STOPKEY operation (the where ROWNUM <= N predicate) doesn't process over ~4 Billion rows and returns wrong results Interna Pasando Jugo
Read currently running SQL statement’s bind variable values using V$SQL_MONITOR.BIND_XML in Oracle 11.2 Interna Pasando Jugo
The most fundamental difference between hash and nested loop joins Interna Pasando Jugo
Oracle Closed World presentation links Interna Pasando Jugo
Which number takes more space in an Oracle row? Interna Pasando Jugo
Exadata v2 Smart Scan Performance Troubleshooting article Interna Pasando Jugo
Dropping and creating tables in read only tablespaces?! Interna Pasando Jugo
The full power of Oracle’s diagnostic events, part 2: ORADEBUG DOC and 11g improvements Interna Pasando Jugo
Oracle memory troubleshooting article Interna Pasando Jugo
Flexible Sqlplus command line history with RLWRAP Interna Pasando Jugo
Execution plan Quiz: Shouldn’t these row sources be the other way around ;-) Interna Pasando Jugo
Quiz: Explaining index creation Interna Pasando Jugo
cursor: pin S waits, sporadic CPU spikes and systematic troubleshooting Interna Pasando Jugo
KGH: NO ACCESS – Buffer cache inside streams pool too! Interna Pasando Jugo
Non-trivial performance problems Interna Pasando Jugo
Calculate SQL_ID and SQL_HASH_VALUE from SQL text Interna Pasando Jugo
Oracle Latch Contention Troubleshooting Interna Pasando Jugo
Oracle Session Snapper v3.10 Interna Pasando Jugo
How to CANCEL a query running in another session? Interna Pasando Jugo
New versions of LatchProf and LatchProfX for latch contention troubleshooting and tuning Interna Pasando Jugo
Oracle Troubleshooting: How to read Oracle ERRORSTACK output?! Interna Pasando Jugo
Using Process Memory Matrix script for calculating Oracle process memory usage on Solaris Interna Pasando Jugo
Oracle Wait Event reference Interna Pasando Jugo
Oracle Peformance Visualization… Interna Pasando Jugo
Bind Variable Peeking – execution plan inefficiency Interna Pasando Jugo
Recursive sessions… Interna Pasando Jugo
Sometimes things are easy (Part 1): How to fix wrapped execution plan text? Interna Pasando Jugo
Beyond Oracle Wait Interface – Part 2 Interna Pasando Jugo
NULL is not zero! Interna Pasando Jugo
Measuring what matters Interna Pasando Jugo
Finding the reasons for excessive logical IOs Interna Pasando Jugo
Explain Plan For command may show you the wrong execution plan – Part 1 Interna Pasando Jugo
Detect chained and migrated rows in Oracle – Part 1 Interna Pasando Jugo
What’s a good way to learn some Oracle internals every day? Interna Pasando Jugo
SystemTap is production supported in Redhat EL5.4 Interna Pasando Jugo
KGL simulator, shared pool simulator and buffer cache simulator – what are these? Interna Pasando Jugo
KGH: NO ACCESS allocations in V$SGASTAT – buffer cache within shared pool! Interna Pasando Jugo
Oracle 11gR2 has been released – and with column oriented storage option Interna Pasando Jugo
latch: cache buffers chains latch contention – a better way for finding the hot block Interna Pasando Jugo
Select COUNT(*) and COUNT(column) are different things! Interna Pasando Jugo
Alter system kill session and ORA-00031: session marked for kill Interna Pasando Jugo
An interview with me Interna Pasando Jugo
How to detect when a cursor was closed from SQL trace output? Interna Pasando Jugo
Identify the SQL statement causing those WAIT #X lines in a (top-truncated) sql tracefile Interna Pasando Jugo
(Secret) Preview of Oracle 12g CBO leaked from Oracle labs… Interna Pasando Jugo
Oracle memory troubleshooting, Part 3: Automatic top subheap dumping with heapdump Interna Pasando Jugo
Using Perfsheet and TPT scripts for solving real life performance problems Interna Pasando Jugo
ORA-04031 errors and monitoring shared pool subpool memory utilization with sgastatx.sql Interna Pasando Jugo
Oracle Performance Visualization videos from Sydney Interna Pasando Jugo
Scripts for showing execution plans via plain SQL and also in Oracle 9i Interna Pasando Jugo
“Free” DBA_HIST AWR views in 11g… Interna Pasando Jugo
I have been troubleshooting since I was a kid! :) Interna Pasando Jugo
Tracing Oracle SQL plan execution with DTrace Interna Pasando Jugo
Seminar feedback and pictures from Singapore Interna Pasando Jugo
Read OS environment variables using DBMS_SYSTEM.GET_ENV() Interna Pasando Jugo
I’m an Oracle ACE Director now :) Interna Pasando Jugo
Oracle 11g: Reading alert log via SQL Interna Pasando Jugo
Another LatchProfX use case Interna Pasando Jugo
The real history of Oracle database revealed! Interna Pasando Jugo
Oracle, Timesten and PL/SQL support Interna Pasando Jugo
The full power of Oracle’s diagnostic events, part 1: Syntax for KSD debug event handling Interna Pasando Jugo
60000 bind variables?! Maybe it’s time to use a temporary table instead… Interna Pasando Jugo
SQL_ID is just a fancy representation of hash value Interna Pasando Jugo
Performance Visualization, Capacity planning and Hotsos Symposium Interna Pasando Jugo
When was a table last changed? Interna Pasando Jugo
Multipart cursor subexecution and PRECOMPUTE_SUBQUERY hint Interna Pasando Jugo
Identifying shared memory segment users using lsof Interna Pasando Jugo
Reliable latch waits and a new blog Interna Pasando Jugo
Oracle memory troubleshooting, Part 1: Heapdump Analyzer Interna Pasando Jugo
Performance Visualization made easy – PerfSheet 2.0 beta Interna Pasando Jugo
A little oradebug enhancement in Oracle 11g Interna Pasando Jugo
Advanced Oracle Troubleshooting Guide, Part 9 – Process stack profiling from sqlplus using OStackProf Interna Pasando Jugo
Transportable tablespaces and ROWID uniqueness Interna Pasando Jugo
VLDB 2008 proceedings, Oracle optimizer plan stability, adaptive cursor sharing and SecureFiles Interna Pasando Jugo
Oracle hidden costs revealed, Part2 – Using DTrace to find why writes in SYSTEM tablespace are slower than in others Interna Pasando Jugo
Flexible sampling of any V$ or X$ view with sample.sql Interna Pasando Jugo
Case study on some rowcache internals, cached non-existent objects and a describe bug Interna Pasando Jugo
Why does even a small difference in SQL text cause a hard parse? Interna Pasando Jugo
Script: Display valid values for multioption parameters (including hidden parameters) Interna Pasando Jugo
The simplest query for checking what’s happening in a database Interna Pasando Jugo
Library cache latches gone in Oracle 11g Interna Pasando Jugo
Advanced Oracle Troubleshooting Guide, Part 8: Even more detailed latch troubleshooting using LatchProfX Interna Pasando Jugo
Closed database and WITH subquery Interna Pasando Jugo
Advanced Oracle Troubleshooting Guide, Part 7: Sampling latch holder statistics using LatchProf Interna Pasando Jugo
Another use case for WaitProf – diagnosing “events in waitclass Other” Interna Pasando Jugo
Killing an Oracle process from inside Oracle Interna Pasando Jugo
cursor_space_for_time To Be Deprecated Interna Pasando Jugo
Advanced Oracle Troubleshooting Guide, Part 6: Understanding Oracle execution plans with os_explain Interna Pasando Jugo
Debugger dangers Interna Pasando Jugo
Short note on KGX Mutexes Interna Pasando Jugo
Generating lots of rows using connect by – safely! Interna Pasando Jugo
Advanced Oracle Troubleshooting Guide, Part 5: Sampling V$ stuff with WaitProf. Really fast. Using SQL! Interna Pasando Jugo
Performance Tools Quick Reference Guide Interna Pasando Jugo
Advanced Oracle Troubleshooting Guide, Part 4: Diagnosing a long parsing issue Interna Pasando Jugo
Snapper shortcut Interna Pasando Jugo
Querying the current tracefile name, using SQL – with tracefile_identifier Interna Pasando Jugo
Oracle Troubleshooting with Snapper – detecting who’s causing excessive redo generation Interna Pasando Jugo
Performance and Scalalability Improvements in Oracle 10g and 11g Interna Pasando Jugo
Using autonomous transactions for sleeping Interna Pasando Jugo
SQL*Net break/reset to client Interna Pasando Jugo
SQL*Net message to client vs SQL*Net more data to client Interna Pasando Jugo
SQL*Net message to client wait isn’t really what it’s thought to be Interna Pasando Jugo
Oracle hidden costs revealed, part 1 – Does a batch job run faster when executed locally? Interna Pasando Jugo
Excellent article on Oracle 11g PL/SQL function result cache Interna Pasando Jugo
Can you write a working SQL statement without using any whitespace? Interna Pasando Jugo
Expensive calculator… Interna Pasando Jugo
Why does Oracle parameter count change during session lifetime? Interna Pasando Jugo
Systematic application troubleshooting in Unix Interna Pasando Jugo
Perl version of Snapper Interna Pasando Jugo
Sqlplus is my second home, part 5: Reading the name of currently executing script Interna Pasando Jugo
Oracle Security, Part 2: Your read only accounts aren’t that read only Interna Pasando Jugo
Sqlplus is my second home, part 4: Getting sqlplus parameter value into a variable Interna Pasando Jugo
A simple interview question Interna Pasando Jugo
How to resolve SQL object and column names all the way to base tables and columns in Oracle? Interna Pasando Jugo
Advanced Oracle Troubleshooting Guide, Part 3: More adventures in process stack Interna Pasando Jugo
Sqlplus is my second home, part 3: Colored selections in Windows XP command prompt Interna Pasando Jugo
Sqlplus is my second home, part 2: Running SQL scripts from remote locations using HTTP Interna Pasando Jugo
Operating systems are lazy allocating memory Interna Pasando Jugo
Advanced Oracle Troubleshooting Guide, Part 2: No magic is needed, systematic approach will do Interna Pasando Jugo
Oracle Session Snapper, part 2: Getting most out of Snapper Interna Pasando Jugo
Oracle 11g internals part 1: Automatic Memory Management Interna Pasando Jugo
Oracle Session Snapper – real-time session-level performance stats for DBAs Interna Pasando Jugo
Sqlplus is my second home, Part 1: HTMLizing your sqlplus output Interna Pasando Jugo
Session-level statspack Interna Pasando Jugo
A gotcha with parallel index builds, parallel degree and query plans Interna Pasando Jugo
My version of SQL string to table tokenizer Interna Pasando Jugo
Advanced Oracle Troubleshooting Guide: When the wait interface is not enough [part 1] Interna Pasando Jugo

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Nube de Palabras Clave

using execution sql troubleshooting part exadata performance oracle session linux

Consistencia de las Palabras Clave

Palabra Clave (Keyword) Contenido Título Palabras Claves (Keywords) Descripción Titulos
oracle 117
part 50
troubleshooting 48
sql 41
performance 33

Usabilidad

Url

Dominio : tanelpoder.com

Longitud : 14

Favicon

Genial, tu web tiene un favicon.

Imprimibilidad

No hemos encontrado una hoja de estilos CSS para impresión.

Idioma

Genial. Has declarado el idioma en.

Dublin Core

Esta página no usa Dublin Core.

Documento

Tipo de documento (Doctype)

HTML 5

Codificación

Perfecto. Has declarado como codificación UTF-8.

Validez W3C

Errores : 0

Avisos : 0

Privacidad de los Emails

Genial. No hay ninguna dirección de email como texto plano!

HTML obsoleto

Etiquetas obsoletas Ocurrencias
<u> 3

Hemos detectado etiquetas HTML obsoletas que ya no se usa. Es recomendable que cambies esas etiquetas por otras similares.

Consejos de Velocidad

Excelente, esta web no usa tablas.
Muy mal, tu web está usando estilos embenidos (inline CSS).
Genial, tu página web usa muy pocos ficheros CSS.
Perfecto, tu web usa pocos ficheros JavaScript.
Su sitio web se beneficia del tipo de compresión gzip. ¡Perfecto!

Movil

Optimización Móvil

Icono para Apple
Etiqueta Meta Viewport
Contenido Flash

Optimización

Mapa del sitio XML

¡Perfecto! Su sitio tiene un mapa del sitio en XML.

https://tanelpoder.com/sitemap.xml

Robots.txt

https://tanelpoder.com/robots.txt

¡Estupendo! Su sitio web tiene un archivo robots.txt.

Herramientas de Analítica

No disponible

No hemos encontrado ninguna herramienta de analítica en esta web.

La analítica Web le permite medir la actividad de los visitantes de su sitio web. Debería tener instalada al menos una herramienta de analítica y se recomienda instalar otra más para obtener una confirmación de los resultados.

PageSpeed Insights

Dispositivo
Categorias

Free SEO Testing Tool

Free SEO Testing Tool es una herramienta seo gratuita que te ayuda a analizar tu web