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Tag: execution

RAID1 – MDADM Mirror – Do not perform parallel reading as expected?

We have a three-way RAID 1 mirror driven by mdadm. I think I’ve read that mdadm should take multiple simultaneous read requests and distribute them to different drives in the mirror (parallel Read)

September 25, 2021By Simo Storage execution, expected, MDADM, mirror, no, parallel, press, RAID, raid1, readLeave a Comment

SQLite Replace () function executes a string replacement

I have a column in the sqlite database that I need to modify.

The column is an array of values, as shown below:

0.021460.04419,0.04551,0.02734,0.011,0.005 The array lacks a comma betwee

September 22, 2021By Simo Sqlite execution, function, REPLACE, replacement, SQLITE, stringLeave a Comment

Sleep caused by SQLite during execution

Is there a similar SQL expression that sleeps like MS SQL WAITFOR sqlite?

Or, is there a way to make sqlite SQL queries run for a long time without adding many rows to the database?

Thi

September 22, 2021By Simo Sqlite execution, Leading, sleep, SQLITE, timeLeave a Comment

SQLite import tab file: .IMPORT is a plurality of inserts or use transactions to group them?

I import millions of rows from a tab file, and the SQLite .import .mode tab is very slow. I have three indexes, so maybe the index is slow. But first I want to check Does .import group batches/all

September 22, 2021By Simo Sqlite card, execution, file, Group, import, INSERT, line, one, options, or, SQLITE, transaction, useLeave a Comment

EFCORE Method for performing SQL statements: Fromsql and ExecuteSQLCommand

Preface The methods of executing Sql statements in EFCore are: FromSql and ExecuteSqlCommand; in EF6, SqlQuery and ExecuteSqlCommand, and FromSql and SqlQuery are very different, and the return val

August 22, 2021By Simo Sql EFCORE, executesqlcommand, execution, fromsql, method, SQL, statementLeave a Comment

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