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How to create a file with a given size in Linux?
...ocksize will perform much worse once it gets very big, as it will allocate and read that amount into memory before writing. If this is somethig like bs=4GiB you'll probably end up swapping.
– Brian
Sep 29 '08 at 7:40
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PostgreSQL: How to make “case-insensitive” query
... answered Aug 10 '11 at 2:47
ChanduChandu
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Howto: Clean a mysql InnoDB storage engine?
...eople create multiple ibdata files hoping for better disk-space management and performance, however that belief is mistaken.
Can I run OPTIMIZE TABLE ?
Unfortunately, running OPTIMIZE TABLE against an InnoDB table stored in the shared table-space file ibdata1 does two things:
Makes the table’s...
Search and replace in bash using regular expressions
...is method, i.e. perl, awk, e.g.:
echo "$MYVAR" | perl -pe 's/[a-zA-Z]/X/g and s/[0-9]/N/g'
This may allow you to do more creative matches... For example, in the snip above, the numeric replacement would not be used unless there was a match on the first expression (due to lazy and evaluation). A...
Apache Tomcat Not Showing in Eclipse Server Runtime Environments
I have tomcat 5.5 installed, running and verifiable at http://localhost:8080/ . The Tomcat menu option appears in the Eclipse menu bar and I can start and stop Tomcat from there. In Eclipse, it does not show as a Server Runtime Environment in Window - Preferences - Server - Runtime Environments, no...
Should URL be case sensitive?
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According to W3's "HTML and URLs" they should:
There may be URLs, or parts of URLs, where case doesn't matter, but
identifying these may not be easy. Users should always consider that
URLs are case-sensitive.
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Using port number in Windows host file
...ws as well as on Unix-like systems). You cannot put port numbers in there, and there is no way to do what you want with generic OS-level configuration - the browser is what selects the port to choose.
So use bookmarks or something like that.
(Some firewall/routing software might allow outbound port...
Postgres - FATAL: database files are incompatible with server
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If you recently upgraded to 11 or 12 from 10.x you can run the below command to upgrade your postgres data directory retaining all data:
brew postgresql-upgrade-database
The above command is taken from the output of brew info postgres
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Reducing MongoDB database file size
...tabase that was once large (>3GB). Since then, documents have been deleted and I was expecting the size of the database files to decrease accordingly.
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NullPointerException in Java with no StackTrace
...interException) occurs for the first time, the full stack trace is printed and the JVM remembers the stack trace (or maybe just the location of the code). When that exception occurs often enough, the stack trace is not printed anymore, both to achieve better performance and not to flood the log with...