我有一个15.4GB的R data.table对象,有2900万条记录和135个变量。我的系统和注册信息如下:
Windows 7 x64 on a x86_64 machine with 16GB RAM."R version 3.1.1 (2014-07-10)" on "x86_64-w64-mingw32"
我得到以下内存分配错误(参见图像)
我将内存限制设置如下:
#memory.limit(size=7000000)
#Change memory.limit to 40GB when using ff library
memory.lim
我有一个有16 GB内存的服务器。
现在我需要设置我的shmmax和shmall,因为服务器的默认值是(用ipcs -l检查)。
------ Messages Limits --------
max queues system wide = 32000
max size of message (bytes) = 8192
default max size of queue (bytes) = 16384
------ Shared Memory Limits --------
max number of segments = 4096
max seg size (kbytes) = 1801
集群设置-
Driver has 28gb
Workers have 56gb each (8 workers)
配置-
spark.memory.offHeap.enabled true
spark.driver.memory 20g
spark.memory.offHeap.size 16gb
spark.executor.memory 40g
我的工作是-
//myFunc just takes a string s and does some transformations on it, they are very small strings, but there's abou
我正在从Win迁移到Mac,并通过Homebrew在MacX10.8.3上安装了PostgreSql 9.2.4
运行initdb命令时
initdb /usr/local/var/postgres -E utf8
我得到以下错误
DETAIL: Failed system call was shmget(key=1, size=2072576, 03600).
HINT: This error usually means that PostgreSQL's request for a shared memory segment exceeded
available memory
运行存储过程以返回数据库中的所有记录(本例中为电话)及其颜色选项。
问题是,当一部手机有4种颜色时,它还会返回4次ModelGroup。
我知道这可能是很明显的事情,还是我需要先把它们放在桌子上?
存储过程:
SELECT
PB.ModelGroup as '@group',
(SELECT
PB1.UID as '@pid',
PB1.Brand as '@brand',
PB1.Title as '@title',
PB1.Friendly_URL