MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 07/15/00 through 07/21/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 39,803 1,870,864
MED90 8,861 180,091
MED85 6,466 55,767
MED80 5,622 31,850
MED75 5,010 22,885
MED66 5,101 18,876
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,675 34,208
2-4 a.m. 526 9,529
4-6 a.m. 272 13,669
6-8 a.m. 1,156 34,913
8-10 a.m. 5,356 173,598
10-12 a.m. 12,434 393,814
12-2 p.m. 11,744 380,168
2-4 p.m. 15,131 465,438
4-6 p.m. 11,710 364,146
6-8 p.m. 6,657 167,982
8-10 p.m. 2,558 94,428
10-12 p.m. 1,644 48,440
__________ _____________ _________________
Total: 70,863 2,180,333
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 363
Davis 1,487
Irvine 168
Los Angeles 405
Riverside 34
San Diego 968
San Francisco 1,730
Santa Barbara 37
Santa Cruz 24
Lawrence Berkeley 30
Lawrence Livermore 11
Los Alamos 0
MELWEB 59,402
Searchlight 5,657
Other - UC 21
Other-Network UC 526
_____
70,863
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 2,744
Davis 29,043
Irvine 3,943
Los Angeles 4,593
Riverside 268
San Diego 6,833
San Francisco 18,163
Santa Barbara 303
Santa Cruz 54
Lawrence Berkeley 93
Lawrence Livermore 386
Los Alamos 0
MELWEB 2,069,730
Searchlight 39,150
Other - UC 19
Other-Network UC 5,011
_____
2,180,333
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 1.1
Standard deviation in seconds 2.9
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.5
Standard deviation in seconds 1.1
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:05
Average session length (minutes:seconds) 18:14
Longest session recorded (minutes:seconds) 231:47
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 384.8
Retrievals per search - standard deviation 4708.8
Percent of searches completed with 0 results 33.1%
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 70,863 13.5%
PRESENT 421,891 80.4%
INIT or CLOSE 31,654 6.0%
OTHER 424 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 4,851 4.8% 1,944 40.1% 4 645.5 3319.3
PERSONAL AUTHOR 21,765 21.4% 6,106 28.1% 7 96.7 983.1
TITLE WORD 9,000 8.9% 3,335 37.1% 3 121.7 1411.3
SUBSET 109 0.1% 30 27.5% 21 249.5 1011.7
SUBJECT WORD 247 0.2% 112 45.3% 7 208.8 1158.7
SUBJECT 1,943 1.9% 998 51.4% 19 535.5 3222.3
EXACT SUBJECT 3,872 3.8% 1,045 27.0% 27 615.1 4523.2
MAJOR SUBJECT 224 0.2% 100 44.6% 20 335.5 1570.6
EXACT MAJOR SUBJ 386 0.4% 105 27.2% 29 915.6 8945.6
EXACT TITLE 725 0.7% 457 63.0% 1 8.7 72.1
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,287 1.3% 441 34.3% 124 1185.8 2650.6
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 66 0.1% 29 43.9% 52 948.1 1457.9
KEYWORD 40,451 39.9% 13,710 33.9% 17 791.1 7359.4
DATE 1,854 1.8% 433 23.4% 8 224.0 2476.2
LANGUAGE 5,635 5.6% 1,724 30.6% 21 270.9 1446.0
UNIQUE ID 356 0.4% 170 47.8% 1 1.0 0.0
ADDED 1,208 1.2% 766 63.4% 5 17.1 29.9
PUB TYPE 2,568 2.5% 649 25.3% 23 142.2 483.9
AUTHOR AFFIL. 621 0.6% 253 40.7% 11 131.8 1084.1
CHEMICAL NAME 13 0.0% 2 15.4% 28 85.6 147.4
EXACT CHEMICAL 1 0.0% 0 0.0% 211 211.0 0.0
AT 3,816 3.8% 1,172 30.7% 19 433.2 2360.6
AGE 208 0.2% 69 33.2% 19 111.9 288.2
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 43 0.0% 10 23.3% 49 148.9 351.4
XXS 133 0.1% 49 36.8% 13 119.9 457.9
XMXS 92 0.1% 46 50.0% 14 54.9 120.9
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 18 0.0% 11 61.1% 25 75.0 104.9
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 20,932 29.5% 7,249 34.6% 7 216.2 2034.1
Single 49,931 70.5% 16,232 32.5% 16 721.5 6687.2
PRESENT commands, by type:
MARC 37.0%
OPAC 29.3%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS