MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 10/01/99 through 10/31/99
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 130,867 8,114,013
MED90 24,958 668,086
MED85 16,872 279,471
MED80 13,687 135,867
MED75 12,308 87,314
MED66 12,393 81,493
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 3,103 114,831
2-4 a.m. 2,243 76,095
4-6 a.m. 431 20,463
6-8 a.m. 2,022 99,041
8-10 a.m. 15,720 657,711
10-12 a.m. 34,866 1,533,405
12-2 p.m. 35,928 1,556,579
2-4 p.m. 42,836 1,883,349
4-6 p.m. 35,620 1,603,352
6-8 p.m. 18,408 860,183
8-10 p.m. 12,387 540,756
10-12 p.m. 7,521 420,479
__________ _____________ _________________
Total: 211,085 9,366,244
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 1,944
Davis 1,316
Irvine 506
Los Angeles 1,893
Riverside 200
San Diego 3,136
San Francisco 3,899
Santa Barbara 541
Santa Cruz 393
Lawrence Berkeley 210
Lawrence Livermore 50
Los Alamos 0
MELWEB 96,738
Other - UC 97,959
Other-Network UC 2,300
_____
211,085
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 124,202
Davis 18,584
Irvine 7,803
Los Angeles 25,809
Riverside 1,411
San Diego 16,277
San Francisco 59,438
Santa Barbara 5,679
Santa Cruz 735
Lawrence Berkeley 2,029
Lawrence Livermore 820
Los Alamos 0
MELWEB 4,329,103
Other - UC 4,745,970
Other-Network UC 28,384
_____
9,366,244
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 1.5
Standard deviation in seconds 5.4
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.4
Standard deviation in seconds 1.0
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
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Median session length (minutes:seconds) 23:08
Average session length (minutes:seconds) 25:51
Longest session recorded (minutes:seconds) 341:05
Average number of searches completed per session 0.0
Retrievals per search - median 4.0
Retrievals per search - average 386.4
Retrievals per search - standard deviation 5236.4
Percent of searches completed with 0 results 30.3%
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 211,085 10.9%
PRESENT 1,645,935 85.2%
INIT or CLOSE 73,099 3.8%
OTHER 1,523 0.1%
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 14,640 4.6% 5,799 39.6% 4 913.1 8417.4
PERSONAL AUTHOR 61,576 19.2% 16,714 27.1% 7 76.3 732.0
TITLE WORD 23,509 7.3% 8,884 37.8% 4 145.7 1072.0
SUBSET 814 0.3% 207 25.4% 32 229.1 694.7
SUBJECT WORD 1,519 0.5% 780 51.3% 18 1464.0 12031.0
SUBJECT 8,498 2.6% 4,583 53.9% 18 603.2 3631.2
EXACT SUBJECT 18,568 5.8% 4,868 26.2% 32 497.8 3425.6
MAJOR SUBJECT 638 0.2% 271 42.5% 17 177.7 608.9
EXACT MAJOR SUBJ 1,541 0.5% 246 16.0% 23 452.1 3485.8
EXACT TITLE 1,840 0.6% 1,121 60.9% 1 19.3 128.9
TREE NUMBER 6 0.0% 0 0.0% 276 595.5 759.6
EXACT JOURNAL 3,578 1.1% 1,062 29.7% 273 1447.9 3545.7
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 159 0.0% 41 25.8% 20 1487.1 15604.4
KEYWORD 119138 37.1% 35,174 29.5% 19 703.7 7576.1
DATE 5,712 1.8% 1,314 23.0% 6 132.5 639.7
LANGUAGE 23,646 7.4% 6,683 28.3% 30 415.5 2600.3
UNIQUE ID 994 0.3% 283 28.5% 1 1.0 0.4
ADDED 1,818 0.6% 912 50.2% 6 18.2 32.5
PUB TYPE 9,978 3.1% 2,618 26.2% 23 142.4 471.1
AUTHOR AFFIL. 2,048 0.6% 1,002 48.9% 8 146.7 1809.8
CHEMICAL NAME 36 0.0% 27 75.0% 12 10.3 9.0
EXACT CHEMICAL 4 0.0% 3 75.0% 2 2.0 0.0
AT 18,388 5.7% 5,665 30.8% 24 542.2 2834.3
AGE 962 0.3% 224 23.3% 21 140.3 425.2
ISN 2 0.0% 2 100% 0 0.0 0.0
ARTICLE 623 0.2% 164 26.3% 30 330.4 1427.1
XXS 724 0.2% 325 44.9% 18 423.8 1873.2
XMXS 355 0.1% 152 42.8% 10 104.0 543.5
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 86 0.0% 55 64.0% 9 38.9 50.9
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 67,719 32.1% 22,326 33.0% 10 314.9 2407.3
Single 143,366 67.9% 41,536 29.0% 16 660.6 7354.3
PRESENT commands, by type:
MARC 35.3%
OPAC 26.7%