MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 08/26/00 through 09/01/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 39,487 2,027,668
MED90 7,841 177,923
MED85 5,516 64,552
MED80 4,663 30,270
MED75 4,318 22,118
MED66 4,322 24,098
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,751 54,110
2-4 a.m. 453 14,584
4-6 a.m. 316 19,270
6-8 a.m. 977 33,517
8-10 a.m. 5,319 199,568
10-12 a.m. 11,945 396,566
12-2 p.m. 11,493 382,717
2-4 p.m. 14,514 511,899
4-6 p.m. 10,236 377,287
6-8 p.m. 4,572 167,330
8-10 p.m. 2,765 104,016
10-12 p.m. 1,806 85,765
__________ _____________ _________________
Total: 66,147 2,346,629
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 171
Davis 606
Irvine 77
Los Angeles 403
Riverside 61
San Diego 1,097
San Francisco 995
Santa Barbara 157
Santa Cruz 12
Lawrence Berkeley 7
Lawrence Livermore 26
Los Alamos 0
MELWEB 54,719
Searchlight 7,090
Other - UC 215
Other-Network UC 511
_____
66,147
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 2,192
Davis 5,104
Irvine 795
Los Angeles 7,840
Riverside 372
San Diego 8,602
San Francisco 11,512
Santa Barbara 2,373
Santa Cruz 82
Lawrence Berkeley 95
Lawrence Livermore 302
Los Alamos 0
MELWEB 2,245,308
Searchlight 57,034
Other - UC 359
Other-Network UC 4,659
_____
2,346,629
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.7
Standard deviation in seconds 2.1
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.3
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:36
Average session length (minutes:seconds) 19:59
Longest session recorded (minutes:seconds) 270:30
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 373.8
Retrievals per search - standard deviation 4270.2
Percent of searches completed with 0 results 31.3%
Percent of searches entered that are long 0.0%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
SEARCH 66,147 12.8%
PRESENT 421,792 81.8%
INIT or CLOSE 27,585 5.3%
OTHER 208 0.0%
SEARCHes completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By index:
JOURNAL 5,019 5.3% 1,998 39.8% 5 755.9 4156.6
PERSONAL AUTHOR 22,401 23.8% 6,012 26.8% 7 85.1 1067.3
TITLE WORD 7,627 8.1% 2,862 37.5% 3 181.0 2277.6
SUBSET 135 0.1% 23 17.0% 22 120.8 484.5
SUBJECT WORD 267 0.3% 101 37.8% 10 1705.0 12276.6
SUBJECT 1,862 2.0% 920 49.4% 18 1460.3 9709.7
EXACT SUBJECT 3,681 3.9% 953 25.9% 32 467.2 1850.1
MAJOR SUBJECT 149 0.2% 59 39.6% 12 846.9 7612.5
EXACT MAJOR SUBJ 305 0.3% 35 11.5% 45 766.3 2321.3
EXACT TITLE 830 0.9% 477 57.5% 1 17.6 170.0
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,290 1.4% 468 36.3% 225 1294.0 2811.4
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 31 0.0% 17 54.8% 3 189.1 629.3
KEYWORD 35,920 38.1% 11,496 32.0% 16 722.9 6439.9
DATE 1,783 1.9% 355 19.9% 5 146.0 1575.7
LANGUAGE 4,697 5.0% 1,214 25.8% 27 341.4 1638.2
UNIQUE ID 252 0.3% 41 16.3% 1 1.1 0.7
ADDED 1,221 1.3% 584 47.8% 6 18.6 47.0
PUB TYPE 2,172 2.3% 485 22.3% 20 156.1 888.4
AUTHOR AFFIL. 781 0.8% 309 39.6% 7 197.6 2860.1
CHEMICAL NAME 7 0.0% 5 71.4% 4 3.5 0.7
EXACT CHEMICAL 20 0.0% 17 85.0% 11 15.0 6.9
AT 3,137 3.3% 957 30.5% 21 401.7 1842.6
AGE 152 0.2% 35 23.0% 36 163.1 423.5
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 74 0.1% 10 13.5% 45 111.1 187.8
XXS 261 0.3% 99 37.9% 30 1302.8 3771.3
XMXS 72 0.1% 23 31.9% 17 192.4 456.2
XS 2 0 0.0% 0 0.0% 0 0.0 0.0
MXS 2 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 4 0.0% 3 75.0% 878 878.0 0.0
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By number of indexes:
Multiple 19,202 29.0% 6,250 32.5% 6 250.5 2251.0
Single 46,945 71.0% 14,425 30.7% 15 660.6 5907.3
PRESENT commands, by type:
MARC 31.4%
OPAC 29.5%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS