我使用
`JetGetDatabaseFileInfo(db_name, &db_page_size, sizeof(db_page_size),JET_DbInfoPageSize);`
`JetSetSystemParameter(NULL, NULL, JET_paramDatabasePageSize, db_page_size, NULL);` to set the same page size of as a database have. There is a database with page size == 32768. On windows 7 this c
使用SQLite数据库,我知道我可以这样做以获得主数据库的当前大小:
SELECT page_count * page_size as size FROM pragma_page_count(), pragma_page_size();
另见此处()
但是,我如何获得附加的数据库的大小?
在我的例子中,我有“main”和一个附加的数据库'db2‘(ATTACH DATABASE 'something.db' as db2;),我尝试了如下:
SELECT page_count * page_size as size FROM db2.pragma_page_count(
要返回当前页面限制的current_items_per_page响应。
pagination.py
class CustomPageNumberPagination(pagination.PageNumberPagination):
page_size = 10 # Number of objects to return in one page
page_size_query_param = 'total_count'
max_page_size = 20
page_query_param = 'page_no'
page
Thanks all for the inputs but now i landed up in another problem .
This is my Orginal syntax
db2 list tablespaces show detail | grep -e " Free pages" -e " Page size"
Free pages = Not applicable
Page size (bytes) = 4096
Free p
在Linux源代码中fs/proc/task_mmu.c文件的第458行,有以下代码: for (i = 0; i < nr; i++, page++) {
int mapcount = page_mapcount(page);
unsigned long pss = (PAGE_SIZE << PSS_SHIFT);
if (mapcount >= 2) {
if (dirty || PageDirty(page))
mss->shared_dirty += PAGE_SIZE;
我有一个控制器:
class MyController < ApplicationController
PAGE_SIZE = 33
include MyModule
#....
method123
end
module MyModule
def method123
# .....
a = PAGE_SIZE
end
end
它抛出错误:uninitialized constant MyModule::PAGE_SIZE。
PAGE_SIZE在MyModule中不应该是可见的,因为包含MyModule在MyController中使用PAGE_
如果没有提供参数,如何测试接受参数的方法是否使用默认值?
示例
# this method shouldn't error out
# if `Post.page_results` without a parameter
class Post
def self.page_results(page=1)
page_size = 10
start = (page - 1) * page_size
finish = start + page_size
return Page.all[start..finish]
end
end
如果不带任何参数地调用p
我看到Linux内核在大于某个阈值时使用vmalloc为fdtable分配内存。我想知道这是什么时候发生的,并有一些更清楚的信息。
static void *alloc_fdmem(size_t size)
{
/*
* Very large allocations can stress page reclaim, so fall back to
* vmalloc() if the allocation size will be considered "large" by the VM.
*/
if (si
我得到了一个value map is not a member of Int错误,我不确定这是什么意思,所以我无法弄清楚它。
我有两个页面,scala.html和scala.jade。创建template.scala文件时会出现此问题。下面是产生问题的两个页面的代码:
scala.html
@page.getProduct().getRichContent().size()
@for(i <- page.getProduct().getRichContent().size()) {
<p>@page.getProduct().getRichContent.get(i)<