orabbix插件監控oracle表空間問題
阿新 • • 發佈:2018-04-20
HA ont true largest 收集 use nts bsp order by
我們安裝好orabbix插件後,查看Tablespaces監控項是發項值為none,第一反應是沒監控成功,其實不然。
1、我們打開orabbix監控項參數的路徑,下面為Tablespaces的sql代碼
[root@-svr1 ~]# vim /opt/orabbix/conf/query.props select ‘- Tablespace ->‘,t.tablespace_name ktablespace, ‘- Type->‘,substr(t.contents, 1, 1) tipo, ‘- Used(MB)->‘,trunc((d.tbs_size-nvl(s.free_space, 0))/1024/1024) ktbs_em_uso, ‘- ActualSize(MB)->‘,trunc(d.tbs_size/1024/1024) ktbs_size, ‘- MaxSize(MB)->‘,trunc(d.tbs_maxsize/1024/1024) ktbs_maxsize, ‘- FreeSpace(MB)->‘,trunc(nvl(s.free_space, 0)/1024/1024) kfree_space, ‘- Space->‘,trunc((d.tbs_maxsize - d.tbs_size + nvl(s.free_space, 0))/1024/1024) kspace, ‘- Perc->‘,decode(d.tbs_maxsize, 0, 0, trunc((d.tbs_size-nvl(s.free_space, 0))*100/d.tbs_maxsize)) kperc from ( select SUM(bytes) tbs_size, SUM(decode(sign(maxbytes - bytes), -1, bytes, maxbytes)) tbs_maxsize, tablespace_name tablespace from ( select nvl(bytes, 0) bytes, nvl(maxbytes, 0) maxbytes, tablespace_name from dba_data_files union all select nvl(bytes, 0) bytes, nvl(maxbytes, 0) maxbytes, tablespace_name from dba_temp_files ) group by tablespace_name ) d, ( select SUM(bytes) free_space, tablespace_name tablespace from dba_free_space group by tablespace_name ) s, dba_tablespaces t where t.tablespace_name = d.tablespace(+) and t.tablespace_name = s.tablespace(+) order by 8) where kperc > 93 and tipo <>‘T‘ and tipo <>‘U‘ tbl_space.NoDataFound=none
這個SQL會返回93%滿的表空間信息,而對應這個監控項,orabbix也定義了觸發器,因為監控項的返回值是文本,而沒有滿足條件的記錄時返回字符串“none“,所以監控項對應的觸發器會檢查返回值開頭是不是none,如果不是,就報警,這樣,用戶除了收到預警信息,還能從返回值的具體值中看到具體時哪個表空間快滿了。
改為3%後測試結果:
當然,大部分時間監控項會返回none,所以我們無法畫出正常未滿的表空間的空間占用時間曲線。只有超過93%慢時,我們才知道具體的占用情況。
如果想收集並保留更多信息,就需要使用自定義查詢,方法就是在query.props文件中加入你想檢查的SQL,比如我們想了解表空間信息,就加以下SQL:
customtbl.Query=select ‘TBL:‘||a.tablespace_name||‘,‘ TBL, ‘Total Size:‘||trunc(sum(a.tots) / 1024 / 1024, 2)||‘,‘ Tot_Size_mb, ‘Free MB:‘||round(sum(a.sumb) / 1024 / 1024, 2)||‘,‘ Tot_Free_mb, ‘PCT Free:‘||round(sum(a.sumb) * 100 / sum(a.tots), 2)||‘,‘ Pct_Free, ‘Max Free MB:‘||round(sum(a.largest) / 1024 / 1024, 2)||‘,‘ Max_Free_mb, ‘Chunks Free:‘||sum(a.chunks)||‘,‘ Chunks_Free from (select tablespace_name, 0 tots, sum(bytes) sumb, max(bytes) largest, count(*) chunks from dba_free_space a group by tablespace_name union select tablespace_name, sum(bytes) tots, 0, 0, 0 from dba_data_files group by tablespace_name) a group by a.tablespace_name customtbl.NoDataFound=none
orabbix插件監控oracle表空間問題