【问题】 最近发现3.4版本mongo集群实例日志发现疯狂刷如下日志: I SHARDING [RangeDeleter] waiting for open cursors before removing...use test; db.runCommand({"killCursors": "expInfos", "cursors": [ 100968947595 ] } ) 【官方解释】 3.4
OPEN_CURSORS 参数类型:整型 取值范围:0-65535 默认值:50 通过alter system修改 此为基本参数 其他信息 该参数指定一个session同时打开的游标的最大数目 需要设定该参数足够大来保证应用的正常运行
如无特殊说明数据库版本为11.2.0.4 OPEN_CURSORS ?
SQL> alter system set open_cursors = 400 scope = both sid = 'test2'; 系统已更改。...500 2 open_cursors 400 SQL> show parameter open_cursors...300 test1 open_cursors 500 test2 open_cursors...integer 300 test2 open_cursors integer 400 test1 open_cursors...300 test1 open_cursors 500 test2 open_cursors
, DSOSCREEN_ENDX); GUI_FillRoundedRect(50, g_Cursors->sCursorHA+3, 61, g_Cursors->sCursorHA+18...(50, g_Cursors->sCursorHB-18, 61, g_Cursors->sCursorHB-3, 3); /* 在横线A和横线B旁边的小圆圈中显示字母a和字母b...) { sprintf(buf, "%5.3fms", (g_Cursors->WaveCursorB - g_Cursors->WaveCursorA));...) { sprintf(buf, "%5.2fs", (g_Cursors->WaveCursorB - g_Cursors->WaveCursorA));...(buf, "%5.3fV", g_Cursors->WaveCursorA - g_Cursors->WaveCursorB); GUI_DispStringAt(buf, 520+70,
out of open cursors....SESSION_CACHED_CURSORS: specifies the number of session cursors to cache....If SESSION_CACHED_CURSORS is not set, it defaults to 0 and no cursors will be cached for your session...Once more than SESSION_CACHED_CURSORS closed cursors are cached, Oracle starts dropping cached cursors...根据上面的分析以及session_cached_cursors的使用率分析,将参数session_cached_cursors增加至300 alter system set session_cached_cursors
(Cursors.Help), new CursorInfo(Cursors.IBeam), new CursorInfo(Cursors.No...(Cursors.ScrollNS), new CursorInfo(Cursors.ScrollNW), new CursorInfo(...Cursors.ScrollS), new CursorInfo(Cursors.ScrollSE), new CursorInfo(Cursors.ScrollSW...), new CursorInfo(Cursors.ScrollW), new CursorInfo(Cursors.ScrollWE),...new CursorInfo(Cursors.SizeNS), new CursorInfo(Cursors.SizeNWSE), new
300 test1 open_cursors 500 test2 open_cursors...300 1 test1 open_cursors 500 1 test2 open_cursors...700 2 * open_cursors 300 2 test1 open_cursors...300 2 test1 open_cursors 500 2 test2 open_cursors...700 1 test1 open_cursors 600 1 test2 open_cursors
(rectangle.Name) { case "Top": Cursor = Cursors.SizeNS...break; case "Bottom": Cursor = Cursors.SizeNS...); break; case "Left": Cursor = Cursors.SizeWE...; break; case "Left": Cursor = Cursors.SizeWE...= MouseButtonState.Pressed) Cursor = Cursors.Arrow; } [DllImport("user32
def data(self, index, role=Qt.DisplayRole): # Check if disabled by the user cursors..._plugin.config["cursors"] if role == Qt.BackgroundRole and cursors["funcs"]:...cursors = self._plugin.config["cursors"] if cursors["navbar"]: for user in self...._plugin.config["cursors"] if not cursors["navbar"]: return None for name..._plugin.config["cursors"] if not cursors["disasm"]: return None for user
windows 下需要用 cmd 登录 oracle 数据库,用 show parameter open_cursors 来查询。 可以看到 open_cursors 的值为 2000。...SQL> show parameter open_cursors; NAME TYPE ------------------------...------------ --------------------------------- VALUE ------------------------------ open_cursors...integer 2000 达梦数据库的 MAX_SESSION_STATEMENT 就相当于oracle 数据库的 open_cursors。
void button1_Click(object sender, EventArgs e) { Cursor cursor = Cursor.Current; this.Cursor = Cursors.WaitCursor...sender, EventArgs e) { Cursor cursor = Cursor.Current; try { this.Cursor = Cursors.WaitCursor...cursor; public WaitCursor() { this.cursor = Cursor.Current; Cursor.Current = Cursors.WaitCursor...所以有人就说了可以直接: private void button1_Click(object sender, EventArgs e) { using (Cursor.Current = Cursors.WaitCursor...这段代码会调用Cursors.WaitCursor.Dispose() 方法,从而当你第二次调用的时候,你会得到null,因为WaitCursor已经dispose了: ?
""" mysql线程池 """ __my_pool = None # 以何种方式返回数据集 TUPLE_CURSOR_MODE = pymysql.cursors.Cursor...DICT_DICTCURSOR_MODE = pymysql.cursors.DictCursor TUPLE_SSCURSOR_MODE = pymysql.cursors.SSCursor...DICT_SSDICTCURSOR_MODE = pymysql.cursors.SSDictCursor def __init__(self, database_name='DB...', cur_type=pymysql.cursors.DictCursor): self.conn = MysqlConn.get_connection(database_name)
function () { this.foreground = null; this.background = null; this.player = null; this.cursors...this.game.width, this.game.height, 'foreground'); this.foreground.autoScroll(-60, 0); this.cursors...) { this.player.body.velocity.x = -this.speed; } else if (this.cursors.right.isDown...) { this.player.body.velocity.x = this.speed; } if (this.cursors.up.isDown) {...this.player.body.velocity.y = -this.speed; } else if (this.cursors.down.isDown) {
if (m_moveType == MoveControlType.VERTICAL) { Cursor.Current = Cursors.HSplit...; } else { Cursor.Current = Cursors.VSplit...; } // Cursor.Current = Cursors.SizeAll; //当鼠标处于控件内部时,显示光标样式为SizeAll...ControlRect.Contains(point)) { Cursor.Current = Cursors.Arrow;...MousePosOnCtrl.RIGHT; } else { Cursor.Current = Cursors.Arrow
', charset='utf8mb4', cursorclass=pymysql.cursors.DictCursor...How to get a row-by-row MySQL ResultSet in python) (1)、对于MySQLdb import MySQLdb from MySQLdb import cursors... db='dbname', charset='utf8mb4', cursorclass = cursors.SSCursor..., #这行是关键 port=3306) (2)、对于pymysql import pymysql from pymysql import cursors...cur = conn.cursor(cursors.SSCursor) 7、utf8mb4是utf8的超集,其中mb4指 most bytes 4。
(valid_q_dim); auto sort_cursors = [&cursors] { std::sort(cursors.begin(), cursors.end...break; } upper_bound += cursors[pivot]->max_score();...for (auto& cursor : cursors) { if (cursor->cur_vec_id() !...// 否则,交换倒排链,可以确保==pivot_id的倒排链交换到前面 std::swap(cursors[i], cursors[i - 1]);...} } } } 首先是倒排链取出来放入cursors,然后对cursors按照vec_id排序,将vec_id较小的排到倒排链的首位 通过score_above_threshold
= cursor_offset;} uint current_cursor_count() const { return m_cursor_offset + static_cast(m_cursors.size...()); } 这里是把当前层的m_max_cursor_index值加上m_cursors.size(),但是在函数add_cursor里面,m_cursors数组每增加一个cursor,m_max_cursor_index...都要加1,也就是说在最里面那层sp_pcontext的计算重复了,计算了2遍m_cursors.size(),导致上面的level=2那层的m_max_cursor_index值变成2*4=8了。...return m_max_cursor_index; -- 可以改为static_cast(m_cursors.size()),二者值一样。...else -- 上层sp_pcontext返回下层所有sp_pcontext的m_max_cursor_index的值,再加上当前层的m_cursors.size()值。
()); } 这里是把当前层的m_max_cursor_index值加上m_cursors.size(),但是在函数add_cursor里面,m_cursors数组每增加一个cursor,m_max_cursor_index...都要加1,也就是说在最里面那层sp_pcontext的计算重复了,计算了2遍m_cursors.size(),导致上面的level=2那层的m_max_cursor_index值变成2*4=8了。...return m_max_cursor_index; -- 可以改为static_cast(m_cursors.size()),二者值一样。...else -- 上层sp_pcontext返回下层所有sp_pcontext的m_max_cursor_index的值,再加上当前层的m_cursors.size()值。...return m_max_cursor_index + static_cast(m_cursors.size()); } 四、问题总结 在GreatSQL的sp里面使用cursor的话,因为
MySQLdb默认查询结果都是返回tuple,输出时候不是很方便,必须按照0,1这样读取,无意中在网上找到简单的修改方法,就是传递一个cursors.DictCursor就行。...print rs # 返回类似如下 # ((1000L, 0L), (2000L, 0L), (3000L, 0L)) 修改后: import MySQLdb import MySQLdb.cursors...MySQLdb.connect(host = 'localhost', user = 'root', passwd = '123456', db = 'test',cursorclass = MySQLdb.cursors.DictCursor...localhost', user = 'root', passwd = '123456', db = 'test') cursor = conn.cursor(cursorclass = MySQLdb.cursors.DictCursor
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