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MySQL maximum memory usage
...28M
thread_cache_size = 8
max_connections = 400
innodb_lock_wait_timeout = 100
for a server with the following specifications:
Dell Server
CPU cores: Two
Processor(s): 1x Dual Xeon
Clock Speed: >= 2.33GHz
RAM: 2 GBytes
Disks: 1×250 GB SATA
...
Android: How to Programmatically set the size of a Layout
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// Changes the height and width to the specified *pixels*
params.height = 100;
params.width = 100;
layout.setLayoutParams(params);
If you want to convert dip to pixels, use this:
int height = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, <HEIGHT>, getResources().getDisplayMe...
R programming: How do I get Euler's number?
...emake()
e^10
exp(10)
# or even:
e <- sum(1/factorial(0:100))
fun stuff
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Better way to set distance between flexbox items
...qual height items with background colors. Absolute positioning with height:100%; width:100% ignores the item's padding.
– Steven Vachon
May 13 '16 at 19:55
4
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Gradient of n colors ranging from color 1 and color 2
...olor.gradient <- function(x, colors=c("red","yellow","green"), colsteps=100) {
return( colorRampPalette(colors) (colsteps) [ findInterval(x, seq(min(x),max(x), length.out=colsteps)) ] )
}
x <- c((1:100)^2, (100:1)^2)
plot(x,col=color.gradient(x), pch=19,cex=2)
...
What's the difference between deadlock and livelock?
...ill burn all of its time-slice. You created a livelock (one CPU will be at 100%). (a bad use would be to protect a sync IO with spinlock. You can easily try this example) On the "kernel space" maybe this note can this help you: lxr.linux.no/linux+v3.6.6/Documentation/…
– Dan...
.toArray(new MyClass[0]) or .toArray(new MyClass[myList.size()])?
... 1 avgt 30 0.025 ▒ 0.001 us/op
c.a.p.SO29378922.preSize 100 avgt 30 0.155 ▒ 0.004 us/op
c.a.p.SO29378922.preSize 1000 avgt 30 1.512 ▒ 0.031 us/op
c.a.p.SO29378922.preSize 5000 avgt 30 6.884 ▒ 0.130 us/op
c.a.p.SO29378922.preSize ...
SQL - Select first 10 rows only?
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In SQL server, use:
select top 10 ...
e.g.
select top 100 * from myTable
select top 100 colA, colB from myTable
In MySQL, use:
select ... order by num desc limit 10
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How to determine CPU and memory consumption from inside a process?
...= now;
lastUserCPU = user;
lastSysCPU = sys;
return percent * 100;
}
Linux
On Linux the choice that seemed obvious at first was to use the POSIX APIs like getrusage() etc. I spent some time trying to get this to work, but never got meaningful values. When I finally checked the ker...
Table Naming Dilemma: Singular vs. Plural Names [closed]
...ddress
public Class Customer {...}
SELECT FROM Customer WHERE CustomerID = 100
Once you know you are dealing with "Customer", you can be sure you will use the same word for all of your database interaction needs.
Reason 5. (Globalization). The world is getting smaller, you may have a team of differ...