MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 09/23/00 through 09/29/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 43,666 2,219,195
MED90 8,739 165,847
MED85 6,045 60,112
MED80 5,096 29,441
MED75 4,711 19,456
MED66 4,823 23,494
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 2,621 91,497
2-4 a.m. 356 10,006
4-6 a.m. 298 28,354
6-8 a.m. 1,085 39,182
8-10 a.m. 5,682 205,675
10-12 a.m. 12,789 434,252
12-2 p.m. 12,797 407,003
2-4 p.m. 14,686 489,953
4-6 p.m. 11,500 417,556
6-8 p.m. 5,569 192,347
8-10 p.m. 3,288 121,338
10-12 p.m. 2,409 80,382
__________ _____________ _________________
Total: 73,080 2,517,545
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 452
Davis 908
Irvine 80
Los Angeles 813
Riverside 46
San Diego 719
San Francisco 1,287
Santa Barbara 20
Santa Cruz 8
Lawrence Berkeley 30
Lawrence Livermore 3
Los Alamos 0
MELWEB 59,256
Searchlight 8,693
Other - UC 109
Other-Network UC 656
_____
73,080
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 4,797
Davis 7,441
Irvine 1,081
Los Angeles 7,892
Riverside 354
San Diego 6,571
San Francisco 15,558
Santa Barbara 50
Santa Cruz 83
Lawrence Berkeley 652
Lawrence Livermore 32
Los Alamos 0
MELWEB 2,366,304
Searchlight 100,776
Other - UC 527
Other-Network UC 5,427
_____
2,517,545
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.8
Standard deviation in seconds 3.7
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.5
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:25
Average session length (minutes:seconds) 19:30
Longest session recorded (minutes:seconds) 217:06
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 478.9
Retrievals per search - standard deviation 6538.5
Percent of searches completed with 0 results 32.2%
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 73,080 12.9%
PRESENT 460,957 81.5%
INIT or CLOSE 31,267 5.5%
OTHER 233 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 4,464 4.3% 1,729 38.7% 4 905.3 4442.0
PERSONAL AUTHOR 23,699 22.9% 6,576 27.7% 7 114.6 1479.4
TITLE WORD 8,239 7.9% 2,988 36.3% 3 225.0 2260.0
SUBSET 124 0.1% 23 18.5% 23 177.3 516.5
SUBJECT WORD 223 0.2% 121 54.3% 13 854.9 4263.8
SUBJECT 2,170 2.1% 1,078 49.7% 17 622.3 3920.5
EXACT SUBJECT 4,774 4.6% 1,189 24.9% 32 531.5 3982.4
MAJOR SUBJECT 239 0.2% 101 42.3% 14 175.6 418.0
EXACT MAJOR SUBJ 485 0.5% 77 15.9% 31 279.8 1069.6
EXACT TITLE 933 0.9% 596 63.9% 1 41.3 411.9
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,278 1.2% 423 33.1% 359 1751.0 3497.4
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 53 0.1% 23 43.4% 12 23.4 32.6
KEYWORD 40,573 39.1% 13,626 33.6% 18 1001.6 10431.4
DATE 1,970 1.9% 510 25.9% 7 237.0 1877.9
LANGUAGE 5,522 5.3% 1,434 26.0% 31 431.0 3377.0
UNIQUE ID 341 0.3% 75 22.0% 1 1.1 0.8
ADDED 1,342 1.3% 627 46.7% 7 71.1 1234.4
PUB TYPE 2,568 2.5% 517 20.1% 22 152.2 647.6
AUTHOR AFFIL. 657 0.6% 294 44.7% 8 190.0 1393.0
CHEMICAL NAME 41 0.0% 14 34.1% 11 38.0 48.2
EXACT CHEMICAL 1 0.0% 1 100% 0 0.0 0.0
AT 3,425 3.3% 1,054 30.8% 22 825.3 10022.0
AGE 221 0.2% 45 20.4% 28 197.3 545.0
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 91 0.1% 19 20.9% 33 231.2 421.0
XXS 152 0.1% 67 44.1% 34 3140.2 25369.9
XMXS 97 0.1% 40 41.2% 13 242.9 900.4
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 20 0.0% 19 95.0% 5 5.0 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 20,937 28.6% 6,968 33.3% 7 312.1 4741.8
Single 52,143 71.3% 16,589 31.8% 16 861.6 8873.2
PRESENT commands, by type:
MARC 31.0%
OPAC 32.2%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS