我使用的是带有3个节点的MySQL Percona XtraDB集群,由于磁盘已满,其中一个节点上的MySQL服务无法工作。修复问题后,我们尝试在此节点上启动MySQL,但出现以下错误:(在此问题之前,所有节点都工作正常) $ sudo /etc/init.d/mysql start
[....] Starting mysql (via systemctl): mysql.serviceJob for mysql.service failed because the control process exited with error code.
See "systemctl sta
我想将data.frame中的变量名从"pmm_StartTimev4_E2_C19_1“更改为"pmm_StartTimev4_E2_C19”。因此,如果名称以下划线结尾,后面跟着任意数字,则它将被移除。
但是,我希望只有当变量名在中包含单词“”时,才会发生这种情况。
我有一些乱七八糟的代码不起作用。任何帮助都将不胜感激!
# Current data frame:
dfbefore <- data.frame(a=c("pmm_StartTimev4_E2_C19_1","pmm_StartTimev4_E2_E2_C1",
我试图了解ARM64中的Zircon (Fuchsia OS内核)分配页面,所以我找到了mmu.cpp
但它就是这样:
if (likely(!test_page_alloc_func_)) {
status = pmm_alloc_page(0, &page, paddrp);
}
pmm_alloc_page在这里的位置:
在这里定义的pmm节点:表示:
// per numa node collection of pmm arenas and worker threads
class PmmNode {
我无法在google上找到PMM区域,也无法在Fuchsi
我有一个Oracle查询,奇怪的是查询结果有时是不同的。
select
cast(pmm_datetime - 1 / 24 * utc_offset as timestamp) as pmm_datetime_utc,
count(distinct(NODEB_NAME)) as num_of_recs
from pmmcounter_db.WC_B_NODEBFUNCTION_QH t1
where pmm_datetime >= to_timestamp('201810230525','YYYYMMDDHH24MI')
and cast(pmm_
我试图使用一个基本的for循环来迭代这个查询,它给出了一个"Company is not iterable“错误。有什么帮助吗?
def activate(request, uidb64, token, pk):
try:
uid = force_text(urlsafe_base64_decode(uidb64))
company = Company.objects.get(pk=uid)
except(TypeError, ValueError, OverflowError, Company.DoesNotExist):
company = None
if
use strict;
use warnings;
use Parallel::ForkManager;
my $log = "/scripts/downloads/test.log";
print "Check the $log file\n" and open(LOG,">$log");
*STDERR = *LOG;
*STDOUT = *LOG;
my $pmm=new Parallel::ForkManager(9);
my @arr=(1..200);
for(@arr){
$pmm->start a
我有以下代码:
public interface PolicyDetailsService {
public void display();
}
以下是实现
@Service("PolicyDetailsServiceImpl")
public class PolicyDetailsServiceImpl implements PolicyDetailsService {
@Override
public void display() {
System.out.println("PolicyDetailsServiceImpl
我的T-SQL子查询返回超过1行: WITH ReportView AS
(
SELECT
PMA.AssetName, ReleaseDt, ExpiresDt, TicketNumber, ChangeDt,
ChangeReasonCd,
ROW_NUMBER() OVER (PARTITION BY PMA.AssetName, ReleaseDt, ExpiresDt, TicketNumber, ChangeReasonCd
ORDER BY ChangeDt A